Not kissing baby.

How did you let people know who came to visit baby to please not kiss them? I don't want to be rude to mine or my SO's family but there was a report in the news last night that an 18 day old baby passed from getting meningitis from someone who kissed her. so this all reassured me that I absolutely don't want anyone kissing baby but don't want to come off like an ass. Thanks ladies!