The Conversation

Nasal COVID-19 vaccines help the body prepare for infection right where it starts – in your nose and throat

PROMO Health - COVID-19 Coronavirus virus DNA - iStock - peterschreiber

The virus that causes COVID-19, usually enters the body through the nose and lands on the mucus membrane at the back of the nasal passage and in the throat. The virus then enters the cells it touches, replicates and spreads.