Virus Cavid-19 symptoms and biography

Corona Virus was first seen as 1960 an infectious bronchitis virus in chickens. Than ‘Human Corona-virus 221-E’ and ‘Human Corona-virus OC-43’ are two common types of viruses in were discovered in the common cold and cough. Later, some other species of viruses were found, notable SARS-CoV in 2003, ‘HCov NL-63’ in 2004, ‘HKU-1’ in 2005, […]