Related by context. All words. (Click for frequent words.) 87 dengue fever 84 Dengue 80 dengue cases 75 dengue virus 73 Dengue fever 73 chikungunya 73 dengue outbreak 72 leptospirosis 71 dengue epidemic 69 chikungunya fever 68 meningococcemia 68 A/H#N# flu 66 mosquito borne disease 66 influenza 66 Chikungunya 66 cholera 66 H#N# 65 H#N# virus 64 swine flu 64 Chikungunya fever 64 viral fever 64 chikunguniya 64 dengue menace 64 AH#N# virus 63 Japanese encephalitis 63 dengue mosquito 63 dengue haemorrhagic fever 63 malaria 63 HFMD 63 Japanese Encephalitis JE 63 Meningococcemia 63 Leptospirosis 63 H#N# influenza 63 Dengue virus 63 AH#N# 63 filariasis 62 influenza A/H#N# 62 Japanese Encephalitis 62 haemorrhagic fever 62 bird flu 62 meningo 62 dengue fever outbreak 62 mosquito menace 62 vector borne disease 61 Chikungunya virus 61 falciparum 61 A/H#N# 61 H1NI 61 kala azar 61 birdflu 61 dengue epidemics 60 dengue outbreaks 60 dengue hemorrhagic fever 60 A/H#N# influenza 60 avian influenza 60 Aedes mosquito 60 water borne diseases 60 HINI virus 60 Marburg virus 60 viral fevers 60 Influenza A/H#N# 60 H#N# flu 59 falciparum malaria 59 swine flu virus 59 mosquito borne virus 59 A/H#N# flu virus 59 A/H#N# virus 59 HIN1 virus 59 measles 59 avian influenza virus 59 mosquito borne diseases 59 malaria dengue 59 NICD 59 Kala azar 59 CCHF 59 chikungunya virus 58 aedes mosquitoes 58 Aedes mosquitoes 58 H#N# influenza virus 58 deadly H#N# virus 58 HINI 58 acute diarrhea 58 AH#N# flu virus 57 Aedes Aegypti mosquito 57 tuberculosis TB 57 Typhoid fever 57 melioidosis 57 dengue chikungunya 57 dengue viruses 57 gastroenteritis 57 Dengue outbreak 57 Influenza 57 bird flu virus 57 SARS 57 Influenza AH#N# 57 AH#N# flu 57 avian flu 57 mosquito borne 57 tuberculosis 57 flu 57 superbug 57 swine flue 57 H#N# swine flu 57 filaria 56 flu virus 56 hemorrhagic fever 56 Filaria 56 dengue hemorrhagic fever DHF 56 vector borne diseases 56 Swine Flu 56 avian flu virus 56 Dengue epidemic 56 flu A/H#N# 56 mosquito borne dengue fever 56 atypical pneumonia 56 Severe Acute Respiratory Syndrome 56 N#H# virus 56 West Nile Virus 56 wild poliovirus 55 West Nile virus 55 dengue mosquitoes 55 lymphatic filariasis 55 rabies 55 mosquito breeding 55 H1 N1 55 Marburg haemorrhagic fever 55 diarrheal disease 55 meningococcal 55 gastro enteritis 55 lepto 55 pandemic H#N# virus 55 vivax malaria 55 Kala Azar 55 West Nile 55 H#N#virus 55 Tuberculosis TB 55 HIN1 54 arboviruses 54 mosquito borne illness 54 enteric diseases 54 Crimean Congo Haemorrhagic Fever 54 H#N# Influenza 54 hemorrhagic dengue 54 haemorrhagic dengue 54 bird flue 54 dengue haemorrhagic fever DHF 54 poliovirus 54 XDR TB 54 Swine Influenza 54 Dr Ramlee 54 aedes aegypti mosquito 54 Aedes Aegypti 54 meningococcal meningitis 54 suspected meningococcemia 54 swine influenza 54 meningococcal disease 54 virus 54 Dengue hemorrhagic fever 54 pandemic influenza H#N# 54 infections 54 mosquito borne infection 54 H#N# strain 54 influenza virus 54 Swine flue 54 typhoid 54 Ebola Reston virus 54 Kandun 54 malarial 54 Mouth Disease HFMD 54 TB 54 corona virus 54 seasonal influenza 54 Dengue Haemorrhagic Fever 53 Hepatitis E 53 cholera outbreak 53 mosquito transmitted 53 deadly Marburg virus 53 MRSA 53 plasmodium vivax 53 Gastroenteritis 53 Diarrhoea 53 Chagas disease 53 avian influenza H#N# 53 influenza A/H#N# virus 53 IPHO 53 C. difficile 53 mosquitoes 53 Japanese encephalitis JE 53 dengue fever epidemic 53 isolation wards 53 Aedes aegypti mosquito 53 Hepatitis B. 53 Ebola 53 MDR TB 53 AH#N# influenza 53 disease 53 infection 53 golden staph 53 Ebola Reston 53 Filariasis 53 pulmonary tuberculosis 52 rotavirus 52 meningitis 52 Pandemic H#N# 52 polio virus 52 polio 52 artemisinin resistance 52 H1NI virus 52 MDR tuberculosis 52 C. diff 52 rotavirus diarrhea 52 waterborne diseases 52 Multi Drug Resistant 52 Lassa fever 52 pertussis 52 virulent H#N# virus 52 mosquito borne viral 52 mutated virus 52 A/H#N# flu cases 52 Buruli Ulcer 52 Kasturba Hospital 52 Dengue Fever 52 plasmodium falciparum 52 communicable diseases 52 A/H#N# flu outbreak 52 meningo encephalitis 52 whooping cough 52 viral haemorrhagic fever 52 paralytic polio 52 Marburg fever 52 HFMD cases 52 encephalitis 52 A/H#N# infection 52 Ngan Chantha 52 legionnaire disease 52 H5NI virus 52 typhoid fever 52 Rift Valley Fever RVF 52 Typhoid 52 mosquito breeding grounds 52 Swine flu 51 NICED 51 H#N# avian flu 51 Influenza A/H#N# virus 51 RGICD 51 Sulianti Saroso hospital 51 WNV 51 schistosomiasis 51 WNV infection 51 RITM 51 Communicable Diseases 51 mosquito Aedes aegypti 51 TB MDR TB 51 throat swab sample 51 aedes mosquito 51 deadly hemorrhagic 51 Nipah virus 51 waterborne disease 51 scrub typhus 51 Falciparum 51 highly pathogenic H#N# virus 51 H#N# avian influenza 51 borne diseases 51 superbug Clostridium difficile 51 hanta virus 51 Birdflu 51 streptococcus suis 51 diarrheal 51 Avian influenza 51 Tamiflu tablets 51 pandemic influenza 51 aedes aegypti mosquitoes 51 west nile 51 invasive meningococcal disease 51 diarrheal diseases 51 acute flaccid paralysis 51 mosquito 51 mosquito borne illnesses 51 chicken pox 51 highly pathogenic avian flu 51 MRSA infection 51 throat swab samples 51 Noro virus 51 lassa fever 51 bird flu epidemic 51 Gastro enteritis 51 Dengue Hemorrhagic Fever 51 Nipah 51 klebsiella 50 pulmonary TB 50 Lok Nayak Hospital 50 mosquito breeding sites 50 poliomyelitis 50 resistant TB 50 CCHF virus 50 yellow fever 50 fogging machines 50 Sars 50 zoonotic disease 50 leprosy 50 XDR tuberculosis 50 atypical pneumonia outbreak 50 shigellosis 50 Anjan Prakash 50 infectious diseases 50 Buggi 50 Flu 50 hantavirus pulmonary syndrome 50 H#N# pandemic 50 enterovirus 50 HPAI 50 acute watery diarrhea 50 infectious disease 50 Thanekar 50 swine flu HC Gera 50 cholera outbreaks 50 Marburg epidemic 50 H1 N1 virus 50 Mutant mosquitoes 50 dengue fever outbreaks 50 communicable disease 50 intestinal infections 50 hemorrhagic dengue fever 50 vibrio cholera 50 meningococcal infection 50 Communicable diseases 50 Ilham Patu 50 H#N# bird flu 50 Klebsiella 50 P. knowlesi 50 Communicable Diseases NICD 50 Swine Flue 50 IEDCR 50 Uchchal 50 Ebola fever 50 Isolation wards 50 strep 50 DENGUE 50 HIV AIDs 50 H#N# Swine Flu 50 respiratory viruses 50 dengue malaria 50 A/H#N# influenza virus 50 bacterial meningitis 50 viral gastroenteritis 50 Hariyadi Wibisono 50 H#N# Influenza virus 50 dengue fever mosquito borne 50 meningitis outbreak 50 diarrhea 50 H1NI flu 50 E.coli bug 50 National Vector Borne 49 Haiti cholera epidemic 49 Lubroth 49 H5NI strain 49 bird flu outbreaks 49 cerebral malaria 49 Hepatitis B 49 Tuberculosis 49 A/H#N# pandemic 49 S. aureus infections 49 aedes 49 snail fever 49 P. vivax malaria 49 throat swab 49 mosquitos 49 multidrug resistant strains 49 Rotavirus 49 enterovirus infections 49 flu viruses 49 Avian flu 49 Wild Polio Virus 49 Baba Raghav Das 49 Influenza Type 49 diarrheal disease malaria 49 Hendra virus 49 H1NI influenza 49 bird flu outbreak 49 CRKP 49 pandemic 49 measles vaccination 49 mumps 49 chikungunya dengue 49 mycobacterial infections 49 H5NI 49 Disease Control Programme NVBDCP 49 super spreaders 49 arenavirus 49 fungal keratitis 49 Chagas 49 Brontispa 49 bacillary dysentery 49 disease HFMD 49 filarial 49 babesiosis 49 Meningococcal Meningitis 49 Cholera 49 Uige province 49 Oliver Rosenbauer spokesman 49 HINI influenza 49 Ebola outbreak 49 WNv 49 HPAI H#N# 49 Salmonella typhi 49 Tropical Diseases 49 tetanus measles 49 visceral leishmaniasis 49 Cerebro Spinal Meningitis CSM 49 HIV AIDS 49 Bairnsdale ulcer 49 GB Pant hospital 49 diarrheal illness 49 Shiv Lal 49 NK Yadav 49 C. diff infection 49 pandemic influenza virus 49 staph 49 Bird flu 49 seasonal flus 49 legionnaires disease 49 HFMD outbreak 49 RNTCP 49 H7 avian flu 49 wild poliovirus type 49 borne illnesses 49 Fujian strain 49 transmit dengue 49 mosquito vector 49 meningococcus 49 noro virus 48 pneumococcal meningitis 48 Superbug 48 Hantavirus 48 bilharzias 48 Marburg outbreak 48 Communicable Disease Centre 48 Uige 48 Aedes 48 Cordova Villalobos 48 highly pathogenic bird flu 48 gastro intestinal illness 48 drug resistant TB 48 cerebrospinal meningitis 48 chickenpox 48 SWINE flu 48 zoonosis 48 Human Swine Influenza 48 Uige Province 48 bilharzia 48 influenza epidemics 48 albopictus 48 flashfloods 48 reemerging infectious diseases 48 Respiratory Syndrome 48 chikungunya outbreak 48 diarrhea cholera 48 mosquito eradication 48 superbug MRSA 48 MRSA staph infection 48 Mosquito borne illnesses 48 serogroup C 48 hantavirus 48 marburg 48 malaria parasites 48 parasitic diseases 48 swine Flu 48 Ilham Patu spokesman 48 EV# virus 48 Jakarta Sulianti Saroso 48 Avian Influenza 48 epidemiological surveillance 48 Thimote 48 norovirus 48 CA MRSA 48 bivalent vaccine 48 Pune Sassoon 48 Acquired Immune Deficiency Syndrome 48 Reeda Sheikh 48 mosquitoes breed 48 parasitic disease 48 cryptococcal meningitis 48 h#n# virus 48 leishmaniasis 48 west nile virus 48 acute diarrheal disease 48 Haffkine Institute 48 zoonotic diseases 48 cryptosporidiosis 48 monga 48 pandemic H#N# 48 Navapur 48 Immunisation EPI 48 transmissible diseases 48 gastro outbreak 48 Deepak Bhatia 48 influenza AH#N# 48 swine flu pandemic 48 lethal yellowing 48 aureus MRSA 48 influenzas 48 mosquito borne viruses 48 infected mosquitoes 48 C. Diff 48 minister Kiran Walia 48 Malaria 48 elephantiasis 48 swine flu epidemic 48 whooping cough epidemic 48 bird flu virus mutates 48 Bilharzia 48 haemorrhagic fevers 48 pandemic H#N# influenza 48 acute gastroenteritis 48 antibiotic resistant superbug 48 Leishmaniasis 48 EDCD 48 Ismail Merican 48 multidrug resistant 48 meningoencephalitis 48 superbug NDM 1 48 Avian Flu 48 Norovirus bug 47 MRSA superbug 47 vibriosis 47 N#H# flu 47 enteroviruses 47 antibiotic resistant bacterium 47 diarrhea dysentery 47 waterborne parasite 47 Legionnaire disease 47 bug Clostridium difficile 47 measles epidemic 47 SARS virus 47 dysentry 47 Coxsackie virus 47 Schistosomiasis 47 cholera bacteria 47 parvo virus 47 Cryptosporidiosis 47 parvo 47 Influenza H#N# 47 vector mosquito 47 feline distemper 47 Ebola epidemic 47 C.difficile 47 chytrid fungus 47 Naxalite menace 47 virus RSV 47 antibiotic resistant superbugs 47 dengue leptospirosis 47 C. difficile infection 47 noroviruses 47 Mohd Ismail Merican 47 novel H#N# influenza 47 pertusis 47 measles outbreak 47 Cholera outbreak 47 P. falciparum malaria 47 H1N 47 Staphylococcus aureus infections 47 Enterovirus 47 Nyoman Kandun 47 Buruli ulcer 47 HIV 47 diahorrea 47 superbugs MRSA 47 super spreader 47 C Difficile 47 anopheles 47 Prabhakar Chatterjee 47 Hepatitis C virus 47 malaria endemic areas 47 aedes aegypti 47 Sexually Transmitted Infections STI 47 vivax 47 SARS Severe Acute 47 Plasmodium Falciparum 47 highly pathogenic virus 47 Hib disease 47 Blueline menace 47 simian foamy virus 47 Agbulos 47 Cholera epidemic 47 Shigella dysentery 47 HIV AIDS scourge 47 mosquito borne malaria 47 methicillin resistant 47 RESU 47 shigella bacteria 47 Acquired Immuno Deficiency Syndrome 47 Like Illness ILI 47 gastroenteritis outbreaks 47 contagious disease 47 pneumococcal infection 47 nosocomial infections 47 albendazole 47 Sars Severe Acute 47 destroy mosquito breeding 47 TTSH 47 malaria endemic 47 NVBDCP 47 C diff infection 47 thalassemia 47 Hepatitis 47 Dr Saketa 47 canine rabies 47 NDM 1 47 serratia 47 H#N# viruses 47 tick borne diseases 47 Shashidhar Buggi 47 Lepto 47 necrotising fasciitis 47 superbug infections 47 WNV infections 47 flu epidemic 47 Ebola haemorrhagic fever 47 staphylococci 47 Antibiotic resistant bacteria 47 highly pathogenic avian influenza 47 Ratard 47 Meningococcal meningitis 47 Legionnaires disease 47 Virology NIV 47 MDRTB 47 mosquitoe 47 viral pneumonia 47 HINI flu 47 parainfluenza virus 47 Mosquito borne diseases 47 MRSA methicillin resistant Staphylococcus 47 asymptomatic carriers 47 Crimean Congo Hemorrhagic Fever 47 Dengue haemorrhagic fever 47 DENV 47 Dr. Rajiv Saigol 47 swine flu outbreak 47 Dr Carnie 47 Hepatitis B virus 47 VRSA 47 Tamiflu resistant 47 epizootic 47 CDAD 47 polio immunization 47 brontispa 47 flulike virus 47 P. vivax 46 swine dysentery 46 enterovirus infection 46 seasonal influenzas 46 multidrug resistant tuberculosis MDR 46 Mukesh Puri 46 viral meningitis 46 rotaviruses 46 rubella immunization 46 pneumococcus 46 arsenicosis 46 MRSA Methicillin resistant Staphylococcus 46 psittacosis 46 MRSA bacteria 46 viral hepatitis 46 Persahabatan 46 dengue mosquito breeding 46 diarrohea 46 bivalent oral polio vaccine 46 guinea worm disease 46 waterborne illness 46 flu outbreak 46 Tuberculosis MDR TB 46 Vector borne diseases 46 murine typhus 46 staph infection MRSA 46 intestinal worms 46 Hiv Aids 46 cholera bacterium 46 nosocomial infection 46 bloodstream infection 46 Officer NK Yadav 46 staphylococcus aureus 46 influenza pandemic 46 Ebola hemorrhagic fever 46 Mosquito borne 46 Legionnaire Disease 46 whooping cough pertussis 46 diarrheal illnesses 46 Shigella bacteria 46 CHIKV 46 monovalent oral polio vaccine 46 H#N# Virus 46 malaria dengue fever 46 monkeypox 46 Sulianti Saroso Hospital 46 MRSA infections 46 mosquito populations 46 Clostridium difficile C diff 46 H5 N1 46 epidemics 46 deadly H#N# avian 46 staphylococcus infections 46 Swine Flu H#N# 46 pH#N# 46 avian influenza pandemic 46 staphylococcus bacteria 46 respiratory illness 46 Falciparum malaria 46 female Aedes mosquitoes 46 BGHMC 46 Aedes albopictus 46 pesticide poisoning 46 foodborne diseases 46 HN# strain 46 Parvo 46 MS Ramaiah Hospital 46 Sexually Transmitted Infections STIs 46 salmonella infection 46 parasite plasmodium 46 Diarrhoea outbreak 46 sars 46 transmittable diseases 46 viral encephalitis 46 acute rheumatic fever 46 waterborne epidemics 46 antibiotic resistant organisms 46 blinding trachoma 46 Staphylococcus aureus MRSA 46 Wolfgang Preiser 46 Human Immuno deficiency 46 C difficile 46 cholera typhoid 46 E coli 46 trachoma 46 influenza viruses circulating 46 avian influenza bird flu 46 buruli ulcer 46 WHO 46 fogging 46 Clostridium difficile 46 sandfly 46 mosquitoes Aedes aegypti 46 legionella 46 nosocomial 46 polioviruses 46 H#N# pandemic influenza 46 H#N# influenza pandemic 46 Sasoon Hospital 46 Pandemic H#N# influenza 46 Hib meningitis 46 neonatal tetanus 46 avian influenza outbreak 46 streptococcal disease 46 Sars virus 46 ESBL 46 gastroenteritis outbreak 46 Plasmodium knowlesi 46 HAIs 46 Health Organisation WHO 46 pandemic influenza A/H#N# 46 vCJD 46 parasite Plasmodium falciparum 46 TB bacillus 46 Chlamydia trachomatis 46 neonatal sepsis 46 Waterborne diseases 46 C.diff 46 Avian Influenza AI 46 Dr. Fermin Leguen 46 Mbomo 46 norovirus gastroenteritis 46 monkey menace 46 acinetobacter 46 Rabies 46 Poliovirus 46 malaria typhoid 46 Encephalitis 46 aureus 46 tick borne disease 46 WPV 46 Oseltamivir 46 parasitic infections 46 bacteria Pseudomonas aeruginosa 46 Measles outbreak 46 E.coli 46 Acute diarrhea 45 pollen allergy 45 hemorrhagic fevers 45 Anopheles mosquitoes 45 C. difficile infections 45 diarrheal deaths 45 Hand Foot 45 Nalgonda Guntur 45 mosquito borne encephalitis 45 bonebreak fever 45 Poliomyelitis 45 H#N# Swine flu 45 bird flu strain 45 streptococcus bacteria 45 Kunjin virus 45 mosquito larvae 45 Cuvette Ouest 45 seasonal flu 45 MRSA strains 45 flu pandemic 45 deadly Hendra virus 45 human metapneumovirus 45 Highly Pathogenic Avian Influenza 45 Eastern equine encephalitis 45 Tuberculosis Control 45 avian influenza outbreaks 45 Hatibandha 45 Neisseria meningitides 45 virulent H#N# 45 whooping cough outbreak 45 measles polio 45 Diarrheal diseases 45 multidrug resistant tuberculosis 45 C. gattii 45 AIDS Acquired Immune 45 bacterial infections 45 cholera epidemics 45 Zaramba 45 vancomycin resistant enterococcus 45 CMV infection 45 allergic bronchitis 45 WHO spokeswoman Fadela 45 Badaohao 45 malarial parasite 45 avoid mosquito bites 45 culex mosquito 45 infectious syphilis 45 hepatitis B 45 Typhoid outbreak 45 Influenza viruses 45 pneumococcal pneumonia 45 streptococcus suis bacteria 45 mosquito transmitted diseases 45 PL Joshi 45 mealy bug 45 mosquito borne parasite 45 HIV infection 45 breakbone fever 45 chytrid 45 influenzalike illness 45 rhinovirus infections 45 Bird Flu 45 midge borne 45 carbapenem resistant 45 Giaspura 45 norovirus outbreaks 45 Pulse Polio 45 Avian Influenza H#N# 45 strep bacteria 45 diarrhea typhoid 45 multidrug resistant MDR TB 45 reinfection 45 drug resistant strains 45 corneal infections 45 bacterial strains 45 Plasmodium falciparum malaria 45 viral hemorrhagic fevers 45 coronavirus 45 immunosuppressed patients 45 Legionnaires Disease 45 multiresistant 45 respiratory syndrome 45 hep B 45 C Diff 45 Pandemic Influenza H#N# 45 waterborne infectious diseases 45 tick borne illnesses 45 Ixiaro vaccine 45 Hep B 45 HSADL 45 Shigella 45 bacterium Neisseria meningitidis 45 pneumococcal strains 45 latent TB 45 influenza strains 45 corneal blindness 45 onchocerciasis 45 Cerebral malaria 45 tubercle bacillus 45 pneumonia 45 Acute Watery Diarrhoea AWD 45 HIB vaccine 45 typhoid outbreak 45 remaining polio endemic 45 MRSA bacterium 45 H#N# flu pandemic 45 Dr NK Yadav 45 influenza A/H#N# infection 45 sexually transmitted infection 45 diarrheal infections 45 ragging menace 45 myiasis 45 parvovirus 45 enteric fever 45 insect borne diseases 45 A/H#N# Flu 45 congenital rubella syndrome 45 herpes infection 45 staphylococcus 45 norovirus bug 45 NIV Pune 45 drug resistant superbug 45 pneumococcal infections 45 Lucille Blumberg 45 sero prevalence 45 H#Y mutation 45 Bagasao 45 Vibrio infections 45 Research IEDCR 45 Leptospira 45 Ungchusak 45 communicable 45 influenza outbreaks 45 paratyphoid 45 mosquito borne viral infection 45 leishmania 45 thalassaemic 45 measles immunizations 45 Aedes mosquito breeding 45 Hariadi Wibisono 45 spokesman Roy Wadia 45 Aedes aegypti 45 flulike illnesses 45 fungal infection 45 staphylococcal infections 45 culex 45 pneumonia diarrhea 45 Burkholderia pseudomallei 45 contagious diseases 45 virus subtype 45 STIs 45 superbugs 45 meningococcal B 45 Gabashane 45 H#n# 45 Short Course DOTS 45 RG Kar Hospital 45 H#N# influenza strain 45 hog cholera 45 glanders 45 pathogenic viruses 45 polio endemic 45 Norovirus 45 isolation ward 45 parasite Trypanosoma cruzi 45 chlamydia 45 A/H#N# Influenza 45 Lyme disease 45 Sulianti Saroso 45 malaria parasite 44 rotavirus infections 44 malaria vector 44 culling poultry 44 parasitic infection 44 Cryptococcus gattii 44 staph aureus 44 Mario Raviglione director 44 influenza viruses 44 South Dinajpur Murshidabad 44 tetravalent vaccine 44 mosquito bites 44 Crimean Congo haemorrhagic fever 44 foodborne bacterial 44 Fenstersheib 44 malaria diarrheal diseases 44 mutated strain 44 bedbugs 44 Sungai Buloh Hospital 44 viral haemorrhagic fevers 44 highly pathogenic 44 spokesman Phuti Seloba 44 Swine fever 44 H5 virus 44 Pascale Brudon 44 tropical diseases 44 Clostridium difficile C. difficile 44 staph superbug 44 Multidrug resistant 44 legionella bacteria 44 Norwalk Virus 44 influenza subtype 44 hookworm 44 Integrated Counselling 44 H7 virus 44 Predy 44 non communicable diseases 44 Melioidosis 44 sleeping sickness 44 waterborne bacteria 44 yaws 44 Neglected Tropical Diseases NTDs 44 childbed fever 44 flulike illness 44 chloroquine resistant 44 waterborne microbes 44 Swine flu pandemic