For goodness sake, Trevor. Educate yourself about Santa. I thought folk knew that, like leprechauns, Santa, his elves and reindeer are unable to catch or spread illnesses. Just look at how long he's being doing this job. How many pandemics has he seen? Has he ever missed a day through flu or a cold?
The only danger he faces this year is landing on whatever it is you've blocked your chimney with!