And if one's natural immunity came from a previous coronavirus infection from 10 year ago?
There is such a thing as cross reactive immunity. Look at the diamond princess cruise ship. They were locked in close quarters sharing a ventilation system for 2 weeks and only 20% of the guests tested positive.
There is such a thing as cross reactive immunity. Look at the diamond princess cruise ship. They were locked in close quarters sharing a ventilation system for 2 weeks and only 20% of the guests tested positive.