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April 2. WHO's Weekly Epidemiological Record publishes new case definition. Airport and port health authorities in affected areas undertake screening of passengers presenting for international travel. WHO issues guidance on the management of possible cases on international flights. April 8-10.
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April 2 • WHO's Weekly Epidemiological Record publishes new case definition. • Airport and port health authorities in affected areas undertake screening of passengers presenting for international travel. • WHO issues guidance on the management of possible cases on international flights.
April 8-10 • Research groups suggest a novel coronavirus might be the etiologic agent of SARS • Using serological tests and RT-PCR specific for the new virus • Electron-microscopic examination of cultures • High concentrations of viral RNA
April 12 • Coronavirus genome responsible for the global epidemic of SARS • Scientists from the CDC confirm these reports. • 29,727 nucleotides fit well with typical RNA boundaries of known coronaviruses.
April 16 • WHO announces a new pathogen. • Koch's postulates; pathogen must meet four conditions. • Scientists found out that the virus caused similar symptoms - cough, fever, breathing difficulty - in the monkeys. • Unprecedented collaboration of 13 laboratories in 10 countries
April 20 • China discloses the number of SARS cases is many holds. • 339 confirmed cases and 402 suspected cases in Beijing • Beijing closes schools. • In Singapore, cluster of illness is identified among employees of a market. • Market is closed for 15 days and the vendors placed in home quarantine.
April 23-29 • April 23, the WHO extends its SARS-related travel advice. • April 25, outbreaks in Hanoi, Hong Kong, Singapore, and Toronto show signs of peaking. • April 29, the Lancet published the first report on SARS in children.