The respiratory virus COVID-19 originated in Wuhan, China, and has spread to more than 100 countries around the world, including the U.S. Rates are rapidly increasing in other European countries, and more recently in the U.S.
The respiratory virus COVID-19 originated in Wuhan, China, and has spread to more than 100 countries around the world, including the U.S. Rates are rapidly increasing in other European countries, and more recently in the U.S.
Your immune system can detect and destroy bacteria, viruses, fungi, parasites or unhealthy cells such as cancer cells. So why do you still get sick?