It’s not a party unless there are some chips and dip on the table, but these tasty nibbles could be hiding some very dangerous bacteria, an investigation reveals.

Norovirus, streptococcus – which gives you a sore throat – and herpes simplex – the cold sore virus – could all be lurking in your favorite sauces if just one party-goer has committed the ultimate party faux pas of double dipping: the act of putting the same crisp or crudité back in a dip after taking a bite. Sour cream is the worst for carrying bacteria.