There are two main types of organisms that cause infections: Bacteria are single-celled organisms with a simple internal structure that can survive in diverse environments, including extreme heat or cold. Most bacteria are harmless and do not cause infection. Some of them help to digest food, destroy microbes that cause disease, and give the body ...
Coronaviruses are a large family of viruses that cause respiratory infections. Coronavirus disease 2019 (COVID-19) was first reported in December 2019 in China. It is the disease caused by a new coronavirus. The virus is moving rapidly around the world. The disease may not initially cause any symptoms. It takes up to 14 days after ...
