DETROIT Since the start of the coronavirus (COVID-19) pandemic, weve learned so much about the risk factors for developing severe illness from COVID-19. READ: State of Michigan updates COVID-19 hospitalization dataTheres a new online tool to help anyone figure out it -- and its free. The tool was built to calculate a persons risk of requiring hospitalization after they were diagnosed with COVID-19. READ: Vaping might increase risk of contracting coronavirus (COVID-19) in teens, young adultsThe study identified several risk factors that have not been seen in other models. The online tool was designed for doctors, but anyone can use it.