Wrap-up Day 2 Plenary Four: Pandemic and avian influenza updates Virology Update: Pandemic H1N1 and H5N1 • Pandemic H1N1 – – – – Origin of pandemic H1N1 virus Genetically and antigenically homogenous A few isolates resistant to oseltamivir Pathogenesis and transmissibility: ferret model • Higher virulence? • Lower transmissibility – Serosurveys • No cross reactivity with seasonal H1N1 • 33 % elderly have antibody • H5N1 – – – – 436 human cases 2009 human cases in Egypt, Vietnam and China Antigenic differences among different clades Unique characteristics of H5N1 epizootic (spread / various species / human cases / mutations) Plenary Four: Pandemic and avian influenza updates Vaccine development: Pandemic H1N1 and H5N1 • H5N1 – More than 20 clinical trials – Different types of vaccines – No standard reagents • Pandemic H1N1 – – – – – – Quality / efficacy / safety Clinical trial starting Immunogenecity: Probably OK Adjuvant required? Availability Access Plenary Four: Pandemic and avian influenza updates Updates on AI Situation • Cambodia – – – – – 8 cases so far, 7 died Continue vigilance Rapid response team ready to respond Hospital preparedness Laboratories (PI, NIPH, NAMRU2) • China – – – – Surveillance 38 cases Lower mortality in children Two family clusters: one possible h-to-h • Viet Nam – – – – – 111 cases with 56 deaths 4 cases in 2009 Human isolates in different clades Continuous outbreaks in poultry Different clades in South and North Plenary Five: Pandemic preparedness and response Framework of action – Prepare for extensive community transmission – APSED approach – Framework for action – Different stages and required intervention – Gaps identified Fukuoka Meeting Summary – Progress with Pandemic preparedness – Areas for improvement – Recommendations Plenary Five: Pandemic preparedness and response Options for public health measures – Goals of PH intervention – Many available PH measures – Key considerations • • • • • Bases on risk assessment, esp severity and potential impact Should be evidence-based Balance benefits against costs Need to be tailored to country and local setting Planning, coordination and communication are a key Monitoring and Evaluation Joint WPRO/ USCDC – Assess core capabilities – Determine progress – Compatible with APSED framework – Some key findings SURVEILLANCE Laboratory Partnership COMMUNICATION COMMAND HEALTH CARE RESPONSE HEALTH SECTOR PUBLIC HEALTH INTERVENTION Individual LEVEL How to slow down the transmission SOCIETAL LEVEL How to minimize preventable deaths Lessons Learnt (Epidemiology) • Countries have been experiencing different stage – – – – Sporadic imported cases Local transmission / unlinked cases / school outbreaks Widespread community transmission Appearance of severe cases / deaths • Different responses are required for different stages – Containment to mitigation: difficult to make a decision (political / technical issues) • Majority cases self-limiting, but some severe cases / deaths – Occurrence of severe cases / deaths depend on epidemiological situation Lessons Learnt (Command) • Responses are based on existing national plan – National plans developed / revised before H1N1 pandemic • Needs for adaptations of plan for H1N1 pandemic • High level command system in place in most countries – Inter-ministerial coordination – Multi-sectoral coordination • Some issues for coordination – e.g. private sectors Lessons Learnt (Surveillance) • Improved surveillance capacity in past years – Fully utilized for H1N1 pandemic response – Laboratory capacity – Sentinel surveillance system • Counting cases – Important and necessary in early stage – Less important and less informative after widespread community transmission – Changing sampling strategies • Changing objectives for surveillance – Early detection / Description and assessment / Monitoring • Change in sampling strategy not done in timely manner – – – – Large number of samples sent to NIC Pressures from hospitals / national authorities / politicians Testing for PH surveillance vs. Testing for patient management Labs overwhelmed • Limited laboratories with diagnostic capability available – No lab at local level Lessons Learnt (PH Interventions) • Different policies for public health interventions, esp. school closures and border control measures – – – – Lack of concrete evidence Some effect in delaying the spread? Negative impact / consequences depend on local setting Public acceptance also depends on local setting Lessons Learnt (Communication) • Most countries appreciate importance of communication • Governments have been active in disseminating necessary information – Media briefing – 24/ 7 hotlines etc. • There are some issues and challenges – Confusing messages from media – Information does not reach to target groups (e.g. physician) Lessons Learnt (Hospital preparedness) • Many countries put hospital preparedness as a priority – Isolation facilities identified – Available isolation facilities limited (no surge capacity) • Infection control: important, but still not fully addressed – Training – Availability of PPE • Case management – Shortage of antiviral stockpiles – Late treatment with antivirals – Many challenges and issues if many severe cases occur (ICU beds, respirator) • Coordination: important but not easy – Hospital authorities – Private hospitals 5/5 5/7 5/9 5/11 5/13 5/15 5/17 5/19 5/21 5/23 5/25 5/27 5/29 5/31 6/2 6/4 6/6 6/8 6/10 6/12 6/14 6/16 6/18 6/20 6/22 6/24 6/26 6/28 6/30 7/2 7/4 7/6 7/8 7/10 7/12 7/14 7/16 7/18 7/20 7/22 Epidemiological Curve in Japan Number of Confirmed Cases 報告数 累積報告数 300 5000 4500 250 4000 200 3500 3000 150 2500 2000 100 1500 50 1000 500 0 0 5/5 5/7 5/9 5/11 5/13 5/15 5/17 5/19 5/21 5/23 5/25 5/27 5/29 5/31 6/2 6/4 6/6 6/8 6/10 6/12 6/14 6/16 6/18 6/20 6/22 6/24 6/26 6/28 6/30 7/2 7/4 7/6 7/8 7/10 7/12 7/14 7/16 7/18 7/20 7/22 Epidemiological Curve in Japan Number of Confirmed Cases 報告数 累積報告数 300 5000 4500 250 4000 200 3500 3000 150 2500 2000 100 1500 50 1000 500 0 0 8 Weeks Pandemic Preparedness Pandemic Response Post-Pandemic Preparedness 2 years Pandemic Preparedness Pandemic Response 2 years Pandemic Preparedness Pandemic Response 2 years Pandemic Preparedness Fatigue Pandemic Preparedness Pandemic Response 2 years Pandemic Preparedness Fatigue Pandemic Response Fatigue Pandemic Preparedness Pandemic Response 2 years Pandemic Preparedness Pandemic Preparedness 2 years H5N1? Novel H3N2? H9N2? Pandemic Preparedness Pandemic Response • Influenza viruses are 2 years unpredictable Novel • There have been and will be H3N2? H5N1? many unexpected • There are still many unknowns H9N2? about H1N1 pandemic • We have to be prepare for unexpected • We should not forget about other threats Pandemic Preparedness Pandemic Response
© Copyright 2024 ExpyDoc
