The rate of myocarditis was also higher among people in the same age group who received Pfizer as their first dose and Moderna as their second than in people who got two Pfizer shots.ĭr. Public health authorities in Ontario, Canada found that the rate of myocarditis was five times higher for males ages 18-24 following the second dose of Moderna's vaccine than Pfizer's. Most patients were in the hospital for a single day and nobody was admitted to intensive care, according to the study. However, there was no difference in the symptoms experienced by people who got either company's shots. The difference was even higher in men, who experienced 21.9 excess myocarditis and pericarditis cases with Moderna's second shot, while women had 1.6 additional cases. However, the risk was higher following the second dose of Moderna's vaccine in people ages 18 to 39, according to the CDC's safety surveillance program, which gathers data from nine health-care organizations in eight states.įor every 1 million second doses administered, Moderna vaccine recipients had 10.7 additional cases of myocarditis and pericarditis over people who got Pfizer, according to the study. Though rare, Pfizer and Moderna's vaccines have both been linked to a risk of myocarditis. Symptoms develop within a few days after vaccination, including chest pain, shortness of breath, heart palpitations and fatigue. The risk of myocarditis after Covid vaccination is highest in teenage boys and young men following the second dose of mRNA vaccines, the technology used by both Moderna and Pfizer. Though myocarditis is most common after a viral infection, the CDC has found a link between heart inflammation and vaccination with Moderna and Pfizer's shots. Among vaccine recipients for whom information on race and ethnicity were known, the lowest completion rates were among Native American or Alaska Native individuals.Myocarditis is an inflammation of the heart muscle that can result in serious health problems, according to the National Heart, Lung and Blood Institute. (The recommended interval between doses is 21 days for the Pfizer-BioNTech vaccine and 28 days for Moderna).Īmericans most likely to have missed the second dose varied by locality.
Some 88 percent had completed the series, while 8.6 percent were still within the allowable interval - 42 days - to receive the second dose. In one analysis, they reviewed the records of 12.4 million people who had received the first dose of a two-dose vaccine regimen and had enough time to get the second dose. researchers looked at some 40.5 million Americans who were vaccinated between Dec. People are not considered fully vaccinated against the coronavirus until two weeks after they receive the second shot of the two-dose regimen (or two weeks after receiving the single-dose vaccine made by Johnson & Johnson).Ĭ.D.C. researchers said, the first groups receiving the vaccine in the United States - health care workers and long-term care facility residents - had easy access to the second dose, since they were likely to have been vaccinated at their workplace or place of residence.Īs vaccines are offered to broader groups of people, the scientists warned, the percentage getting fully vaccinated may drop. While the data were “reassuring” over all, C.D.C.
Federal health officials urged local vaccinators to take steps to ensure that everyone comes back, including scheduling a return appointment when giving the first shot, sending reminders, and rescheduling missed or canceled appointments. The percentage of people completing the regimens varied markedly by jurisdiction and between demographic groups, however. The analyses, by investigators with the Centers for Disease Control and Prevention, included data on tens of millions of Americans who received the Moderna or Pfizer-BioNTech vaccines between mid-December and mid-February. Nearly nine in 10 Americans who received the first dose of a two-dose Covid-19 vaccine went on to complete the regimen, and most people who received two doses got them within the recommended time frames, federal health officials reported on Monday.
0 kommentar(er)
