Efficacy Of Vaccines In The Face Of Adverse Reactions

Efficacy Of Vaccines In The Face Of Adverse Reactions

Vaccinations are very fastly ramping up in the U.S. Greater than 175 million shots of this Covid-19 vaccine that has been already administered, as per the vaccine tracker at a rate of around 53 doses per hundred people.

Efficacy Of Vaccines In The Face Of Adverse Reactions

But some of the developments have dampened this excitement: This week there have been a few of the vaccination sites in the U.S. which paused operations after some patients reported some adverse reactions after following the vaccine shot of Johnson & Johnson. This vaccine is linked to the blood clots in 4 people that have received the vaccine dose. One among the four was quite fatal, as the EMA or European health officials have confirmed.

Efficacy Of Vaccines In The Face Of Adverse Reactions

A few incidents of “breakthrough infections” have been the cause of worry among health experts.  Some people who have received both shots and thus are fully vaccinated against Covid-19 have still been infected with the virus and in some cases, patients have died.

Both issues cause grave concerns, said Dr. William Schaffner, an infectious disease professor at the Vanderbilt University School of Medicine. But the advantages of getting vaccinated — severe reactions remain incredibly rare — are much more than the risks of Covid-19 infection, he said.

Health experts all over the world and especially in the US agree on one point that all three Covid-19 vaccines which are presently authorized in the US are quite safe and highly effective in preventing Covid-19 infection.

Pfizer and Moderna, which in their clinical trials days were found to be almost 94% to 95% effective at preventing Covid-19 infection, have lately been studied under actual conditions following their authorization in the States and other countries. The data in the study by US Centers for Disease Control and Prevention report showed both vaccines were 90% effective at preventing infections.

But there is a gap of 10% efficacy so “breakthrough infections,” or cases of Covid-19 despite full vaccination, are to be expected from time to time. But one should not make out that the vaccines are less effective, said Dr. Anthony Fauci at a White House briefing on Friday.

The number of individuals who were breakthrough infections is very less in comparison with a 90 plus percent vaccine efficacy. So there is no need to be worried about any shift or change in the efficacy of the vaccine,” Fauci said in reply to a question from reporter  Kaitlan Collins.

The Johnson & Johnson vaccine caused four cases of blood clots, one case at the time of clinical trial and the remaining three during the vaccine’s rollout in the US, the European Medicines Agency confirmed on  Friday. But in one of the cases, the patient died.

Vaccination sites in Colorado, Iowa, Georgia, and North Carolina this week suspended vaccinations till further notice when a few people reported adverse reactions from the Johnson & Johnson vaccine. In Colorado, two patients out of 11 people who complained of nausea and dizziness were taken to a hospital for a checkup but were released without hospitalization, Health care provider Centura Health told on Friday that the other nine people recovered after taking juice and water. 

In a statement that was released on Friday Kristen Nordlund said that CDC is aware of some incidents of vaccine recipients feeling light-headedness, dizziness,  feeling faint, sweating and rapid breathing, and sweating symptoms following COVID-19 vaccines in Colorado, Georgia, and North Carolina.

CDC officials have into consideration various reports of the recent adverse events very seriously and are constantly analyzing the safety and also effectiveness of various vaccines, as said by Schaffner. So, Johnson & Johnson vaccine is still safe to use.


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