COVID-19, short for coronavirus disease 2019, is an infectious disease caused by the SARS-CoV-2 virus, a type of coronavirus. The disease was first identified in Wuhan, China in December 2019 and has since become a global pandemic, affecting millions of people around the world.

The virus primarily spreads through respiratory droplets when an infected person talks, coughs, or sneezes, although it can also spread through contact with contaminated surfaces. COVID-19 symptoms can range from mild to severe, with some people experiencing no symptoms at all. Common symptoms include fever, cough, fatigue, body aches, and loss of taste or smell. In severe cases, COVID-19 can cause pneumonia, acute respiratory distress syndrome (ARDS), and even death.

The COVID-19 pandemic has led to a global health crisis, with many countries implementing strict measures to slow the spread of the virus, including lockdowns, social distancing, and mask mandates. Vaccines have also been developed and authorized for emergency use in many countries, with ongoing efforts to vaccinate as many people as possible.

It's important to stay informed about the latest developments in the COVID-19 pandemic and to follow guidelines from health authorities in your area to help prevent the spread of the virus.