About one-fifth of people in the United States have been fully vaccinated against COVID-19

That's about 66 million people

And about 112 million people - about one-third of the population - have received at least one dose since the vaccine drive started in mid-December.

The US has a population of about 330 million.

The US is using the Moderna and Pfizer vaccines, which require two doses, as well as the Johnson & Johnson jab, which becomes fully effective after just one dose.