COVID-19 is a highly contagious disease caused by the SARS-CoV-2 virus, a new strain of coronavirus that originated in China. Only ten months after this new respiratory disease was identified, it has already infected 37 million people in the world; 7.6 million (21%) of them are Americans.
Infected individuals may suffer mild, moderate, or severe respiratory symptoms, depending on their overall health status. The symptoms may appear within 2-14 days after the individual was exposed to the virus. Older people with underlying medical conditions are more at risk of developing complications.
However, studies show that asymptomatic carriers are responsible for 80% of COVID-19 transmission. This means that seemingly healthy but infected people, who show no signs or symptoms of the disease, spread it to their close contacts like family members. This highlights the importance of testing. But there are many types of test. This page aims to give you more information about them, paying particular attention to the rapid COVID-19 antigen test.
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