What’s happening: We’ve known all along that vaccines could only be manufactured, distributed and administered at a limited pace. We’re now seeing those limitations play out in real time.

Americans eligible for the vaccine can’t get appointments, as all available slots fill up almost immediately after they open up.

In some places, where vaccines are administered on a first-come-first-served basis, people have camped out in line for hours — or even overnight — trying to get a shot.

New York’s website said last week that all vaccine appointments are booked for the next 14 weeks. Although 7 million New Yorkers are eligible, the state is only receiving 300,000 vaccine doses a week from the federal government.