Why a booster shot from a new manufacturer is good
Since protection from your first two shots become weaker in your body, it is recommended by WHO and the Centers for Disease Control and Prevention in the U.S. or CDC to get a third shot.
In normal circumstances, two shots should be sufficient to give some protection to the recipients. But in the case of the coronavirus, experts believe there is need for a third shot to control the desease.
A third shot will increase the chances for better immune systems among the population and this will reduce the spread of the virus.
Let’s see about this study conducted by Brazilian and Oxford University researchers on 1,240 Sinovac vaccine recipients who were given different booster combinations.
The subjects received shots from Pfizer and Sinovac. The study found that people who received two doses of Sinovac should be boosted with a different vaccine to increase their protection against Omicron.
CDC’s guidelines
According to the CDC, anti-virus protection wanes over time. And this is completely normal. Bodies are naturally very efficient, and they need to be able to respond to a variety of infections, so they don’t want to waste resources constantly maintaining the highest level of defence against a pathogen they may or may not encounter.
In this context, it refers to receiving a booster shot — or an additional dose of vaccine to strengthen your body’s defence against the coronavirus — from a different manufacturer than the one that provided your initial vaccination regimen.
According to Pharmaniaga Bhd, citing a Yale University study, two doses of Sinovac Covid-19 vaccine with a Pfizer-BioNTech booster dose are less effective and produce a lower immune response against the Omicron variant than other strains.
Pharmaniaga, the licenced distributor of Sinovac vaccine in Malaysia, on the other hand, stated that a separate study by Sinovac Biotech Ltd found that three doses of Sinovac Covid-19 vaccine produced higher neutralising antibodies in 95 percent of recipients compared to 3.3 percent by the second dose against a variant of concern, including Omicron.
More studies
A third booster dose of a COVID-19 vaccine manufactured by AstraZeneca, Pfizer-BioNTech, or Johnson & Johnson significantly increases antibody levels in those who have previously received two doses of Sinovac’s CoronaVac shot, according to a study.
CoronaVac received the greatest boost from a viral vector or RNA shot, including against the Delta and Omicron coronavirus variants, according to researchers from Brazil and Oxford University.
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