where did the new form of pneumonia sars start
Timeline of the SARS outbreak On November 16, 2002, an outbreak of what is believed to be severe acute respiratory syndrome (SARS) began in the Guangdong province of China, which borders on Hong Kong. The first case of infection was speculated to be a farmer in the Shunde district of Foshan County. The People's Republic of China (PRC) notified the World Health Organization (WHO) about this outbreak on February 10, reporting 305 cases (including 105 health-care workers) and 5 deaths;[1] it was later reported that the outbreak in Guangdong had peaked in mid-February, but that appears to be false, as later 806 infections and 34 deaths were reported.[2]
Polio vaccine The first polio vaccine was the inactivated polio vaccine.[1] It was developed by Jonas Salk and came into use in 1955.[1][6] The oral polio vaccine was developed by Albert Sabin and came into commercial use in 1961.[1][7] They are on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.[8] The wholesale cost in the developing world is about US$0.25 per dose for the oral form as of 2014.[9] In the United States, it costs between $25 and $50 for the inactivated form.[10]