The CDC tally includes two-dose vaccines from Moderna and Pfizer/BioNTech, as well as Johnson & Johnson's one-shot vaccine as of 6:00 a.m.

halted use of Johnson & Johnson's one-dose COVID-19 vaccine on April 13 to study extremely rare cases of serious blood clots in a handful of vaccinated Americans, mostly women under 50, then lifted the stay 10 days later.

Germany is to make Johnson & Johnson's COVID-19 vaccine available to all adults, Health Minister Jens Spahn said on Monday, adding that they will be able to receive the shot on the advice of a doctor.

Resting heart rate increases for some people as a reaction to the COVID vaccine.

The researchers collected data from more than 4,000 Americans using a smartphone-based app that reports on physiological activities from smartwatches, and found that some people experience increased heart rate as a reaction to the vaccine.

According to the study, the researchers found that some people's resting heart rate increased up to an additional 1.5 beats per minute (BPM) after receiving a dose of either the Pfizer or Moderna vaccine.

Vaccine recipients who had been infected with COVID experienced higher heart rates.

According to the study, people who had been previously infected experienced heart rate increases of more than 1.5 BPM after the first dose between the first and fifth day after vaccination.

For the second dose, both those previously infected and those who hadn't had COVID saw an increase of more than 1.5 BPM between the first and fifth day after vaccination."We identified a rapid rise in heart rate the day after vaccination, and one that was more robust after the second dose, unless the participant had prior COVID-19 infection," the researchers stated in the study.RELATED: This Vaccine Side Effect Could Mean You Already Had COVID, New Study Says.

Those who got the Moderna vaccine experienced the most significant changes in heart rates.

While this vaccine response was reported in participants who received both the Pfizer and Moderna vaccines, the researchers found more significant heart rate changes in those who got Moderna after both doses.

According to the study, Moderna participants experienced heart rate increases of more than 0.5 BPM after the first dose, while Pfizer recipients experienced increases of less than 0.5 BPM.

For the second dose, both increases were higher, but Moderna participants experienced an average increase of more than 2 BPM while Pfizer participants saw an average increase of more than 1 BPM.For more COVID news delivered straight to your inbox, sign up for our daily newsletter.

According to the study, most people vaccinated with Moderna and Pfizer experienced an increase in their resting heart rate in the two days after their vaccination, with 70 percent experiencing it after the first dose and 76 percent experiencing it after the second.

For the first dose, participants' heart rates did not return to normal until the fourth day after they received their shot.

And for the second vaccine dose, their heart rates did not return to normal until the sixth day after their shot.