Is this reasonable? (Scenario in description)

Is it reasonable that I don’t want anyone but my husband and I to kiss our baby (5 weeks old) or touch his face?

I didn’t really think people would do that because 1) he’s a newborn and I have always heard that you just don’t do that to newborns, 2) there’s kind of a pandemic happening!

My in-laws started kissing our baby the first time they met him. I talked with my husband about it because I thought he had already spoken to them about it. He said he hadn’t but he would. They kept kissing him until it was addressed again. Then they wouldn’t kiss his face directly but decided it was fine to kiss their hand and put it on his lips or cheek. I don’t really like them doing that either. Now not only does he have their mouth germs but their hands as well! They also kiss his feet, hands, and arms. My husband said he didn’t think it was that big of a deal. I said I think it is. Baby constantly has his hands in his mouth. He touches his arms, and even though he doesn’t touch his feet or put them in his mouth yet, he will one day, and I don’t want them to be in the habit of doing that and just continue.

I just think it’s completely unnecessary for them to kiss him! My mom is absolutely crazy about our son and sees him almost every day, but she has never once kissed him because she has common sense! It wasn’t even something I had to address with her!

I want to address this personally with my in-laws, but I know it will lead to a big blowout and they will say I’m being too strict or too dramatic, so I wanted to check and see if others thought I was being over the top.

Also, some other info to consider, my MIL works in healthcare, so she’s around patients constantly—some of whom I would think would have contagious illnesses. My BIL works cleaning moving trucks and is constantly around people.