An additional shot may be imminent, but is there sufficient evidence that it is needed?

Should we give a third chance or not? And this question will be raised in the coming weeks to the Health Council, which must advise the Council of Ministers in this regard. Other countries have already started, such as Israel.

More and more research indicates that vaccines are less effective against the delta variant, becoming less effective over time and less effective at preventing vaccines from getting infected. On the basis of that information, a discussion is being made about an additional injection.

But is there enough information to make this decision? This is what we now know about how vaccines work in practice.

Efficiency over time

Israel and the United Kingdom were the first countries to introduce mass vaccination. So it is not surprising that those countries are the first to notice when vaccine protection decreases over time.

In Israel, efficacy against infection declined by July up to about 40 percentThe Ministry of Health said. Also studying from the UK It means lower efficacy. About three months after the second dose was given, the study says, Pfizer’s vaccine protection dropped to about 75 percent.

The effectiveness of the AstraZeneca vaccine also decreases, but at a slower rate than that of Pfizer’s vaccine. “We expect protection against infection to be similar to that of vaccines after about four months,” said researcher Quinn Boyles of the University of Oxford.

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Megan Vasquez

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