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More than two-thirds of Americans now say they’re satisfied with the coronavirus vaccine rollout — a dramatic increase from just a month ago, a new poll released Tuesday reveals.

The Gallup web survey conducted from March 15-21 found 68 percent of adults back the rollout, up 24 points from the 44 percent who said so in February.

The satisfaction rate has doubled from 34 percent in January, as the rollout got off to a slow start amid complaints of long lines and limited supply.

The growing support — registered across all age and political groups — comes as 146 million COVID-19 vaccine doses have been administered and 52.6 million Americans have been fully vaccinated.

President Biden on Monday said 90 percent of citizens will be eligible for the vaccine next month.

About three-quarters of Americans — 74 percent — now say they have either received the vaccine or are willing to get inoculated. That’s up 3 points from February. The percentage of respondents who still stay they will not get a shot dropped from 29 percent to 26 percent.

Republicans were the most skeptical group, with 54 percent saying they have or will get vaccinated, the poll found.

In September, only half of Americans said they would get vaccinated.

Vaccine skeptics were asked why they were reluctant to get immunized.

About one-quarter said they want to wait and see if the vaccine is safe, another 16 percent questioned the the speed with which the vaccine was developed, 15 percent did not trust vaccines in general, and 10 percent said they already have COVID-19 antibodies due to having the virus.

The Gallup survey was conducted more than two weeks after the Food and Drug Administration granted emergency-use authorization for the Johnson & Johnson single-dose vaccine.

Now that three FDA-approved vaccines are available, supply has increased across the country, which has likely contributed to the increase in satisfaction with the rollout, the pollster said.

In its analysis of the findings, Gallup noted the country is on track to meet President Biden’s goal to vaccinate 200 million Americans by the end of his first 100 days in office.

“Yet, there have been considerable problems in some states with the rollout, and there still is not enough overall supply to meet demand. If people who are anxious to get vaccinated have to wait weeks or months to do so, Americans may become less satisfied with the rollout,” Gallup said.

“The 26% reading for Americans who remain unwilling to receive the shot has been fairly steady over the past few months. In order to achieve herd immunity and a return to normal, pre-pandemic life, public officials will likely continue to try to chip away at this reluctant group.”

Results for the poll were based on self-administered web surveys conducted March 15-21 with a random sample of 3,905 adults The margin of error is plus or minus 2 percentage points.