Dr. Omar Al-Heeti is an assistant professor of medicine at Southern Illinois University and practices internal medicine with a specialty in infectious diseases. He received his medical degree from the ...

With Covid-19 cases up across the country, many people are once again relying on home tests to guide decisions about going to work and sending their kids to school and other activities. A lot of those ...

Antigen tests can identify the presence of antigens within the body, which are substances that cause immune responses, such as the release of antibodies. The immune system, and antibodies specifically ...