US National Institutes of Health
At a Glance
  • A nasal spray of the Oxford/AstraZeneca COVID-19 vaccine protected hamsters and monkeys against serious disease and reduced the amount of virus in the nose.
  • Less virus in the nasal passages could decrease the risk that vaccinated people spread the virus, even if they don’t feel sick.
  • A clinical trial is underway to test intranasal vaccination in people.