You may want to rethink accepting a slice of cake after someone blows out the candles.
A recent study, “Bacterial Transfer Associated with Blowing Out Candles on a Birthday Cake,” has found that blowing out birthday candles spreads tiny drops of saliva and tons of bacteria onto the cake.
Researchers compared the icing on two cakes — one where candles were blown out, and another where they were not.
They found that the icing of the cake with blown-out candles had 1,400 percent more bacteria than the icing on the cake that was left alone.
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