Nearly 2 million Pfizer/BioNTech coronavirus vaccine recipients in Israel were included in a large study showing the vaccine slightly raised swollen lymph, shingles, heart inflammation, and risk nodes. However, it also found that infection with Covid-19 can worsen certain heart diseases such as heart attacks and blood clots as well.
This is the first large study to consider the risk of infection versus the risk of vaccination during the same period, and the researchers found infection risks far outweighed vaccine risks.
The Covid Vaccine Is Safer Than Catching It
As per the study results, the BNT162b2 vaccine posed no risk of adverse events during this massive national vaccination program, study author Dr. Ran Balicer of Tel Aviv’s Clalit Research Institute said in the paper. SARS-CoV-2 (SARS-CoV-2) vaccines based on messenger RNA (mRNA) had excellent safety profiles despite being small and limited patient population, though. Considering the wide range of potential adverse events related to the BNT162b2 mRNA vaccine, a thorough evaluation of safety is needed.
Myocarditis, a type of inflammation of the heart, was discovered to be associated with both of the mRNA vaccines made by Pfizer and Moderna. In nearly all cases, male teenagers were affected and the excess cases occurred per 100,000 vaccinated people.
They wrote: Herpes zoster infection, lymphadenopathy, appendicitis, and myocarditis posed the biggest risks. We also examined the incidence of these adverse events based on data from more than 240,000 infected persons to place these risks in context.
Vaccines didn’t lower the risk of myocarditis as much as the virus did. There were 11 cases of myocarditis for every 100,000 people who were vaccinated with CIVID-19, researchers concluded. In addition, they discovered a few surprises.
As they explained: The current study showed several initially unexpected effects. There has been some evidence suggesting the BNT162b2 vaccine protects against certain conditions including anemia and intracranial hemorrhaging. The same adverse events were also described in this study as for complications of SARS-CoV-2 infection, suggesting that the vaccine’s protective effect is likely related to providing immunity against undiagnosed SARS-CoV-2 infection.
Dr. Grace Lee wrote in a commentary that he was not involved with the study: Myocarditis may be associated with messenger RNA (mRNA) vaccines, but they can also prevent cases of arrhythmias, myocarditis, acute kidney injuries, and thrombosis. To compare these risks, it is important to determine the risk of a person getting infected with SARS-CoV-2, and that risk can change over time and with the place.
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Covid-19 mRNA vaccine information sheets were updated last June to include a warning about the risk of myocarditis as well as a related inflammatory condition, pericarditis. Medical professionals say that the condition must be diagnosed quickly, but once diagnosed, it is easily treated and patients usually recover quickly.
Every vaccine program must be safe, especially if a pandemic is in progress. A swine influenza A strain that resembled the 1918 pandemic strain was identified in 1976 by the Centers for Disease Control and Prevention1, and a vaccination program was implemented for the entire U.S. population as a result. The vaccine program was halted in December 1976 as a precaution, since the pandemic never materialized. The experience underscored the importance of real-time vaccination safety surveillance during pandemics and the benefits of context on decision-making. To keep up with the rapid pace of public health issues, multiple data sets are needed to draw meaningful conclusions in real-time. During the Covid-19 pandemic, designing rigorous post-approval studies has been difficult due to several factors, including the pandemic’s impact on health care utilization, the limited initial supply of vaccines, and disparities in access to vaccines.