Pfizer-BioNTech COVID-19 (New Coronavirus Infection) According to a new study, the vaccine is effective in preventing hospitalization for at least 6 months.
Kaiser Permanente Southern Researcher California (KPSC) collected data from the company’s healthcare network to find out how often fully vaccinated people tested positive for the virus or were hospitalized for the virus.
They found Pfizer The vaccine was 90% effective in preventing hospitalization for the first 6 months after full vaccination.
Also, existing variants appear to have little ability to bypass the vaccine. This includes the highly infectious delta subspecies that currently cause almost all cases in the United States.
The effectiveness of vaccines in infection prevention declines significantly over time, but after 5 months it drops to 47%.
Previous studies have made similar findings regarding the effectiveness of the Covid vaccine in preventing infection and hospitalization.
The efficacy of the Pfizer vaccine in hospitalization prevention was stable at about 90% for all age groups for 6 months after firing.
Although there was no difference between the age cohorts, the effectiveness of the vaccine in infection prevention declined over time, falling below 50%.
The results of the study show that the recent rise in breakthrough cases may have little to do with factors specific to the delta mutant, but instead with the efficacy of the vaccine, which declines over time. Indicates that there is.
However, these breakthrough cases are less serious and the vaccine still demonstrates its ability to prevent hospitalization and death.
‘Our variant-specific analysis [Pfizer] The vaccine is effective against all currently concerned variants, including Delta, “said Dr. Luis Joder, senior vice president of Pfizer vaccines, in a statement.
“COVID-19 infections in people who have been vaccinated twice are most likely due to decline rather than being caused by Delta or other mutants evading vaccine protection.”
Published at for research Lancet, The team collected data from 3.4 million members of the KPSC Health Network.
They analyzed their health records to find out how often people tested positive or necessary treatment for the virus.
The people whose data were included in the study were grouped by age to find potential differences in vaccine efficacy during the 6 months after the second jab.
Researchers have found that there is little difference between age cohorts in both hospitalization and the ability to prevent infection.
In all age groups, the effectiveness of the vaccine slowly declined over the months, eventually dropping to about 50 percent.
Overall, the vaccine showed 73% effectiveness in preventing infection during the first 6 months after vaccination.
Efficacy for hospitalization was stable at all ages, with little change during the first 6 months.
Other studies have made similar findings, including: Mayo Clinic Study From August, the Pfizer vaccine was found to be only 42% effective in preventing infection in July, but still 75% effective in preventing hospitalization.
At the time, KPSC findings stated that this was not the case, but delta variants were thought to be responsible for the reduced effectiveness.
another study According to a study by the Centers for Disease Control and Prevention, the effectiveness of the Pfizer vaccine has declined to about 50% over time.
The findings are consistent with what many health officials have said in the last few weeks in conversations about Covid booster shots.
The White House wanted to roll out a booster to all Americans starting September 20th, citing the reduced efficacy of the vaccine as the reason for the third injection.
Some officials and experts objected. Among them are 18 senior staff members of the Food and Drug Administration (FDA). Publish the report He opposed last month’s boosters and instead cites the effectiveness of vaccines to prevent hospitalization as a reason why boosters are not needed.
The FDA has refused to allow boosters to all Americans over the age of 18. Instead, we only allowed Americans over the age of 65, or Americans with comorbidities vulnerable to the virus, to use Pfizer Booster.
The White House reported that qualified Americans quickly took advantage of the availability of boosters and received nearly two million shots last week.
Pfizer’s COVID-19 vaccine is more than 90% effective against hospitalization for first six months Source link Pfizer’s COVID-19 vaccine is more than 90% effective against hospitalization for first six months