pandemic词源

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Coronavirus disease (COVID-19) pandemic

The coronavirus disease 2019 (COVID-19) pandemic is a global outbreak of coronavirus – an infectious disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Cases of novel coronavirus (nCoV...

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Coronavirus disease (COVID-19)

Even though vaccines protect against severe disease and death, it is still possible to spread SARS-CoV-2 to others after being vaccinated. WHO response The World Health Organization is the global coordinating agency f...

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Pandemics - World Health Organization (WHO)

A pandemic is the worldwide spread of a new disease.An influenza pandemic occurs when a new influenza virus emerges and spreads around the world, and most people do not have immunity. Viruses that have caused past pan...

www.who.int

Pandemic influenza - World Health Organization (WHO)

An influenza pandemic is a global epidemic caused by a new influenza virus to which there is little or no pre-existing immunity in the human population. Influenza pandemics are impossible to predict; and they may be m...