Fact-checked: No, a healthy diet and regular exercise alone cannot prevent COVID-19
Social media users have made claims, contrary to expert medical advice, that eating a healthy diet and doing regular exercise will enable the human immune system to fight off COVID-19 alone and without the need of vaccination. In reality, otherwise healthy people have contracted COVID-19 and some have experienced severe cases. Vaccination greatly reduces the severity of the illness if a breakthrough infection occurs. The AP has fact-checked this claim.