Not only can vuvuzelas cause hearing loss, they can also spread colds and flu.
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Vuvuzelas have the potential to spread colds and flu as a lot of breath goes through the vuvuzela," McNerney said, adding that they can infect others on a greater scale than coughing or shouting.
McNerney was involved in a recent study of eight healthy volunteers who blew the vuvuzela in order to measure what comes out at the other end. They found that tiny droplets which can carry flu and cold germs were formed at the bottom of a vuvuzela.
Those particles are small enough to stay suspended in the air for hours, and can enter into the airways of a person's lungs
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