KV Network

Covid variants are more threatening

Covid variants are more threatening
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Though the covid-19 threat has subsided a bit but the overall risk still remains as the COVID-19 vaccines by Pfizer and AstraZeneca are believed to be less effective against the Delta variant of coronavirus compared to the Alpha variant. This fact has come to fore after the conclusion of a study led by researchers at the University of Oxford.
India and rest of the world has grappled with two successive covid-19 waves and experts have been predicting a much deadlier third wave with a new variant of the virus threatening human kind.
Though a lot has been achieved by scientists as many potential vaccines have been developed but the new variants have been posing new threats and challenges. The threat becomes all the more difficult to tackle as various developing nations have witnessed vaccine hesitancy among its people.
Even in various Indian states people have been avoiding the vaccine despite the fact that the pandemic has threatened the entire population over the months that have gone by.
Vaccines have proved to be an effective shield in fighting the coronavirus. A person can develop immunity- the ability to resist infection in two ways: either after being infected with a virus or by getting vaccinated. However, immune protection isn’t always equal.
The difference in immune response between vaccination and infection seems to be even greater when dealing with new variants. In early July, two new studies were published that show COVID-19 vaccines, though slightly less effective than they are against the older strains of the virus.
COVID-19 vaccines generate both antibody and T cell responses and these responses are much stronger and more consistent than immunity after natural infection. One study found that six months after receiving their first dose of the Moderna vaccine, 100% of people tested had antibodies against SARS-CoV-2. This is the longest period that has been reported in published studies so far.
Two doses of either vaccine still provided at least the same level of protection as having had COVID-19 before through natural infection, the latest Oxford study suggests.
The researchers analysed 2580,021 test results from nose and throat swabs taken from 384,543 participants aged 18 years or older between December 1, 2020 and May 16, 2021.
They also analysed 811,624 test results from 358,983 participants between May 17, 2021 and August 1, 2021.
The yet to be peer-reviewed study found that the people who had been vaccinated after already being infected with COVID-19 had even more protection than vaccinated individuals who had not had COVID-19 before.

 


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