Health Check: does green mucus mean you’re infectious and need antibiotics?

Antibiotics provide no benefit for the common cold and other respiratory illnesses caused by viruses. Estrada Anton/ShutterstockWhen you have a cold or other respiratory illness, you might see a range of different colours of mucus or snot when you blow your nose. We’re often told – even by doctors – that green or yellow secretions indicate you’re infectious. But this isn’t true.
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