COVID19 DANGER IN WORLD
Corona Virus About Corona virus. Q:What are corona viruses? A: Corona viruses are common viruses that most people get some time in their life. Human corona viruses usually cause mild to moderate upper-respiratory tract illnesses. Corona viruses are named for the crown-like spikes on their surface. There are three main sub-groupings of corona viruses, known as alpha, beta and gamma, and a fourth provisionally-assigned new group called delta corona viruses. Human corona viruses were first identified in the mid 1960s. The five corona viruses that can infect people are: alpha corona viruses 229E and NL63 and beta corona viruses OC43, HKU1, and SARS-CoV, the corona virus that causes severe acute respiratory syndrome. Corona viruses may also infect animals. Most of these corona viruses usually infect only one animal species or, at most, a small number of closely related species. However, SARS-CoV can infect people and animals, including monkeys, Himalayan palm ci...