Covid Vaccine: How long will it be Effective?

The coronavirus epidemic has come under a lot of control. By lifting the lockdown, many countries are slowly trying to return to pre-epidemic conditions. The covid vaccine is playing an important role in this as part of a concerted effort. At least 22 approved vaccines are being used in different countries in today’s world. More than 6 billion vaccines are thought to have been applied.

Pfizer-Biontech, Moderna, and Astra-Zenker vaccines are the most widely given among conventional vaccines. The United States, the United Kingdom, and other developed countries have approved these three vaccines and administered them to their citizens. Although no vaccine can stop the infection, they can reduce the severity of the disease. The Pfizer-Bioentech vaccine 71-96%, Modern 95-96 percent, and Astra-Geneca 80%are effectively reduce the hospital admissions rate of Kovid patients when applied outside the laboratory.

But another issue that has grown out of the vaccine’s effectiveness is how long can the vaccine protect us? Antibodies to the coronavirus, which are normally produced after vaccination, may be depleted over time. As a result, do we have to get vaccinated again? Some of these questions have been logically raised. Since the most widely available data on Pfizer-Biontech, Modern, and Astra-Zane vaccines, researchers have been able to draw a rough picture of these three.

For those whose immune system is high, any vaccine is supposed to protect them for a long time, and in case of weak immunity, the time will naturally be less. In addition, mutations in the virus are important. According to Lana Beibo, an expert at the Indiana University School of Medicine, mutations can produce a type of coronavirus that may be capable of evading the vaccine. In that case, we may not be able to get the protection we hope for.

Analyzing the existing data, most experts have expressed the opinion that the safety of the Covid vaccine can last up to 6-7 months. This protection may be maintained for a maximum of 1-1.5 years, but then an additional dose will be required. The flu vaccine may be given year after year, but covid may need something similar.

From this point of view, the extra dose or booster issue has come up loudly. Israel is the first country in the world to launch a booster. Israel has been giving booster doses to people who received the Pfizer vaccine at least five months before July 2021. Preliminary results showed that the amount of corona-resistant antibodies increased significantly during the first two weeks of the booster. Still, there was no clear answer about how long it would remain in the blood.

Sara Tartoff, head of the Southern California Department of Research and Analysis, has been researching the effectiveness of the Pfizer-Bioentech vaccine over time. His team has shown that taking two doses of the Pfizer vaccine can reduce hospital admissions for at least six months.

The results of a comparative study of a few conventional vaccines show that the Pfizer and Modern vaccines have an initial efficacy of about 95%, which decreased after eight months but did not fall below 50%. However, in the case of Johnson’s vaccine, the immunity is reduced by 50 percent in less than two months. Russia’s Sputnik has again shown good results. In this case, it takes about seven months for the resistance to come down to 50 %. India has been holding on to 50% of biotech vaccines for about five months. In the case of inform, the initial efficacy is about 50%.

Research on the covid vaccine is still ongoing. It will last longer, and only then will a clear conclusion be reached on how long a vaccine can provide protection. However, keep in mind that the amount of corona-resistant antibodies will continue to decrease over time. The body may no longer have enough antibodies to fight off the virus at some point. However, by the time the human body is infected with the coronavirus, new antibodies can be quickly developed to reduce the severity of the infection. According to David Toffam, a professor at the University of Rochester, coronavirus infections can be as common as those of those who have been vaccinated.