You go Yasmin despite the nay-sayers! Do U have 2b a research scientist like me to write about COVID-19? When did T-cells and antibodies become outdated? Please provide references if you are going to respond without facts or hyperlinks, unlike this brave writer. Who cares if he or she has a degree as long as he can be informative to the ignorant masses without a shepherd.
Here u go. I found this link in a matter of seconds for you.