> That's what happened with the four other coronaviruses that are in wide circulations in humans. They are thought to have caused terrible pandemics when they f

> That's what happened with the four other coronaviruses that are in wide circulations in humans. They are thought to have caused terrible pandemics when they first got to humans which were deadly in adults but not bad in children. Yes, this is now thought to be the case for the 1889-1890 pandemic.