The third dose of the COVID vaccine reduces the risk of hospitalization due to the Omicron variant by 88 percent. This has come to the fore in studies conducted in the United Kingdom (UK). It also showed that two doses were not as effective against Omicron and their effectiveness began to decline after six months. The UK Health Protection Agency (UKHSA) has collected data from these studies and has data for all vaccines.
What did the results of the studies reveal?
According to a UKHSA report shared by Dr Eric Topol, director of the Scripps Research Translational Institute, a second dose between two and 24 weeks after dosing Omicron was 72 percent effective against the risk of hospitalization, but after 25 weeks this figure It has come down to only 52 percent. There was a significant increase in safety after the third dose, and two weeks later, safety with Omicron was 88 percent.
Studies found that AstraZeneca (Covishield) vaccine had no effect on Omicron five months after the second dose. The effectiveness of Moderna’s and Pfizer’s vaccines dropped from 65-70 percent to just 10 percent six months after the second dose. The vaccines were 65 to 75 percent effective four to six weeks after a booster dose, 55–70 percent after five to nine weeks, and 40–50 percent after more than 10 weeks.
Omicron has half the risk of hospitalization from Delta – report
The UKHSA report also states that Omicron has half the risk of hospitalization compared to Delta’s. remains less than According to the report, symptomatic cases saw an average 68 percent reduction in the risk of hospitalization after the third dose.
Significantly, the booster dose is believed to be very important in preventing the spread of Omicron variants. This variant is able to significantly overcome immunity produced by two doses, although preliminary evidence suggests that a booster dose provides sufficient protection against it. Studies are currently underway on this topic and UKHSA has released its results based on some such studies.
Why is Omicron considered dangerous?
The scientific name of the Omicron variant, first detected in South Africa, is B.1.1529 and it has 32 mutations in its spike protein. Experts say that this variant can be more infectious and dangerous than other variants of the virus. It has also managed to dodge vaccines to a great extent. The WHO has termed it a ‘variant of concern’ and many countries have imposed restrictions to stop it.