Full approval would allow the vaccines to be used after the public health emergency is over in the U.S. It will also allow the companies to advertise their vaccines to people, which could help encourage vaccination, Dr. James McDeavitt, senior vice president and dean of clinical affairs at Baylor College of Medicine, told ABC News.

\"I think there's a significant benefit if we start to have some privately produced, professionally produced advertisements that are gonna encourage people to get vaccinated,\" he said. \"It could be a significant driver.\"

At the same time, McDeavitt would also encourage people not to wait for approval if they plan to get the vaccine.

\"If you wait a month or two or three, you're exposing yourself to risk that is unnecessary and preventable,\" he said. \"[The COVID-19 vaccine is] free, it's incredibly safe and it's readily available. In my personal opinion, it makes no sense to wait.\"

Dr. John Brownstein, an epidemiologist at Boston Children's Hospital and an ABC News contributor, said that if waiting for approval gets more people vaccinated, that's a positive, but he also said there are risks in waiting as COVID-19 transmission remains active.

\"All signs point to the full approval,\" he said. \"So that may factor into the decision, of expected approval versus the potential risk of being unvaccinated.\"

\"PHOTO:
Al Seib/Los Angeles Times via Getty Images
PHOTO: A vial containing roughly 6 doses of the Pfizer COVID-19 vaccine is displayed in Vernon, Calif., March 23, 2021.
>

Beyond approval, paid time off was another sticking point for people who are not yet vaccinated. The Kaiser Family Foundation survey found that 21% of employed, unvaccinated adults would be more likely to get the vaccine if their employer gave them paid time off to get it and recover from side effects.

Additionally, between 10% and 15% of unvaccinated adults said they would be more likely to get the vaccine if there was a financial incentive, such as money or free tickets, the survey found.

Seven percent said they would get vaccinated \"only if required.\" Full FDA approval could open the door to more companies and schools mandating it, further increasing vaccine uptake, Brownstein said.

\"I think we will see an opening up of more vaccine mandates by employers or other institutions, even perhaps government institutions,\" Moss said. \"I think they will feel more comfortable mandating that their employees get vaccinated, obviously with certain rules about exemptions, after a full approval.\"

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