Medical imaging is the central part for diagnosing and detecting diseases in today’s healthcare system. Covid has shut down the whole world with affecting millions of people. Number of deaths and critical cases were more. The medical practitioner’s ability to identify coronavirus (COVID-19) is now crucial. Even after vaccination, there are still possibilities to get infected by corona. Covid19 has taken many forms as Delta plus variant, Omicron virus, and now recently NeoCov variant. As a result, identifying the ill people is crucial in preventing the disease from spreading. This research examines the many medical imaging methods used to diagnose the covid19 virus and other infections. Furthermore, an introduction of AI ideas in medical imaging, with an emphasis on various ML and DL approaches. A taxonomy is constructed to categorize the study articles for optimal understanding.