How many deaths has the bird flu caused?

How many deaths has the bird flu caused?

To date, the number of H5N1 WHO-confirmed human cases amounts to 628 with 374 deaths from 15 countries. Human infections tend to occur during December–March and are associated with bird migratory paths and seasonal outbreaks in poultry.

What is the mortality rate of H5N1?

The official WHO estimate of the H5N1 case-fatality rate of around 60% is considered by some as an over-estimate due to several problems.

How is H7N9 transmitted?

The major source of influenza A(H7N9) infection in humans was poultry or birds handled in live bird markets or slaughtered at home. Direct exposure to infected birds has been identified as a risk factor for transmission ( ).

Is bird flu lockdown over?

Cases of bird flu continue to be confirmed in both poultry and other captive birds and the Avian Influenza Prevention Zone ( AIPZ ) will remain in force until further notice (with only the housing measures component being lifted from 0:01 on the 2 May 2022).

Is there a vaccine for H7N9?

Currently, there is no vaccine for H7N9 infection. Scientists have taken early steps to identify a strain of the virus that could be used to make a vaccine if it is needed. The seasonal flu vaccine will not protect against H7N9. Seasonal flu vaccines protect against seasonal influenza viruses.

How many people have died from the H7N9 virus?

About 40 percent have died. The CDC estimates that the H7N9 virus has the greatest potential compared with other influenza A viruses to cause a pandemic, although the risk is low, because like other type A viruses, it is not easily transmitted between people in its current form.

Is H7N9 a bird flu?

Influenza (Flu) H7N9 is a bird flu strain of the species Influenza virus A (avian influenza virus or bird flu virus). Avian influenza A H7 viruses normally circulate amongst avian populations with some variants known to occasionally infect humans. An H7N9 virus was first reported to have infected humans in March 2013, in China.

What is the mortality and morbidity of H7N9 infection?

As of 2019, the laboratory-confirmed case fatality risk of H7N9 infection is 39%. However, laboratory-confirmation is biased towards detecting the severest cases.

What do we know about the 5th H7N9 epidemic?

A 5th epidemic of the H7N9 virus began in October 2016 in China. The epidemic is the largest since the first epidemic in 2013 and accounts for about one-third of human cases ever reported. The cumulative total of laboratory-confirmed cases since the first epidemic is 1,223. About 40 percent have died.