Gargling salt water is a time-tested way to alleviate sore-throat pain. As a nasal lavage, it can help clear stuffy sinuses associated with colds and allergies. But, is gargling salt water effective against the symptoms of COVID-19?

The United Kingdom’s COVID-19 death toll exceeds 40,000, by far the worst yet reported in Europe, raising more questions about Prime Minister Boris Johnson’s handling of the coronavirus crisis.