In the U.S., the Biden administration has announced the goal of having 70 percent of American adults inoculated by Independence Day on July 4th.
That would be at least one dose for around 160 million people.
To do that, officials say they'll have pharmacies offer walk-in appointments, and set up mobile clinics.
So far, around 56 percent of American adults have gotten at least one dose, and around 40 percent are fully vaccinated.
Other countries, too, are trying to open up as soon as they can.
Italy has confirmed that it's launching a so-called "green pass" so that visitors can come in without quarantining if they can show they've been vaccinated or have tested negative.
Prime Minister Draghi says that should be ready by June.
And Israel, a vaccine leader, is opening gyms and swimming pools now to people who are not vaccinated.
And for those who do have a green pass, there'll be no capacity limits on places like sports venues.
And in Germany, for vaccinated people, they're lifting the curfew and restrictions on social gatherings.
That's a controversial move, though, because some say it discriminates against young people who are still months away from getting their vaccines.