SARS 2003, SARS broke out in 24 provinces, autonomous regions and municipalities in China, affecting 266 counties and municipalities.

As of August 6th 10, there were 5,327 clinically diagnosed cases of atypical pneumonia in Chinese mainland, 4,959 cases were cured and 349 cases died.

Transmission through close air droplets and aerosols does not rule out close contact transmission.

Fast onset, wide spread and high mortality.

Up to now, 393 people have been infected with avian influenza in 15 countries and regions, including 248 deaths, with a mortality rate of 63%.

Since 2003, 3 1 person has been infected with avian influenza in China, and 2 1 person has died.

At the beginning of 2004, avian influenza swept across the United States and some Asian countries, and millions of poultry in China, Japan, Viet Nam and other countries were infected and died, and many people may have died of avian influenza virus.

It spreads through digestive tract, respiratory tract, skin injury and conjunctiva.

Avian influenza has a long history and is mainly spread among birds. So far, it has mainly spread from birds to humans.

Influenza A (H 1N 1) was first discovered in March 2009. It broke out in Mexico and quickly spread all over the world.

The World Health Organization (WHO) originally called this influenza "human swine flu" and later renamed it "Influenza A H 1N 1".

On June 1 1, WHO announced that the early warning level of influenza A (H 1N 1) was raised to level 6, and the world entered the epidemic stage.

This influenza is a new respiratory infectious disease, and its pathogen is a new influenza A virus strain H 1N 1. The virus gene contains gene fragments of three influenza viruses: swine flu, avian flu and human flu.