I'm not a virologist or anything close, but reading this it seems like definitely good news?<p>If I am understanding it right, it's saying many people already have T-cells from common colds that can to some extent recognise Covid-19, and those that have had Covid, even a mild case, have T-cells that seem to last quite a while.
This previous discussion covers the same topic:<p><a href="https://news.ycombinator.com/item?id=24076096" rel="nofollow">https://news.ycombinator.com/item?id=24076096</a>