Having just been caught out by a myth, here's a helpful CNN video and article: One dangerous coronavirus 'self-check test' is circulating on social media. Here's why you should avoid it. The myths listed are: Myth: Drinking water will protect you. Myth: Gargling salt water will protect you. Myth: If you can hold your breath for 10 seconds without coughing you're OK. Myth: If you have a runny nose it's just a cold Myth: If you have coronavirus you'll get pneumonia Myth: Coronavirus patients will experience a drowning sensation.