One dangerous coronavirus 'self-check test' is circulating on social media. Here's why you should avoid it.
https://www.cnn.com/2020/03/16/us/coronavirus-myths-debunking-holding-breath-10-seconds-trnd/index.html
https://www.cnn.com/2020/03/16/us/coronavirus-myths-debunking-holding-breath-10-seconds-trnd/index.html