The US licensed the fourth injection with the vaccine of Pfizer- BioNTech and Moderna

The US Food and Drug Administration (FDA) plans to license Pfizer-BioNTech and Moderna’s COVID-19 vaccine to fourth shot (also known as the second booster) for people over 50 years old due to concerns about reduced immune effectiveness in this population.

In addition, the FDA also allows a fourth injection for a younger group of people with compromised immune systems, namely people over 12 years old with the Pfizer-BioNTech vaccine and over 18 years old with the Moderna vaccine. The fourth dose will be given at least 4 months after the third dose, thereby providing better protection, preventing disease progression and the risk of hospitalization.

The move comes after scientists were concerned about the spread of sub line BA.2 belong to Omicron variantwhich is the cause of the increase in the number of new cases in many countries.

According to some American medical experts, it would be an appropriate choice for the people of this country to receive the fourth injection.

Data from Israel with people over 60 years of age show that the fourth dose of vaccine provides 3 months more protection compared to the previous 3 doses.

The fourth dose of vaccine increases protection by 3 months compared to the previous 3 doses. (Photo: AP)

According to data from the US Centers for Disease Control and Prevention (CDC), the number of new cases in this country has decreased sharply compared to January, but in the past week there has been a slight increase.

Pfizer CEO Albert Bourla said that the FDA’s emergency use of the company’s vaccine for the fourth shot will help meet the current need and the company is also focusing on developing a new COVID-19 vaccine. update, not only has the ability to prevent current variants of the SARS-CoV-2 virus, but also has a long-term effect.

Experts also emphasized that the 3-dose injection has also brought significant benefits to people over 50 years old, especially in preventing aggravation and death. Therefore, the US Centers for Disease Control and Prevention said, this booster shot would not be officially recommended.

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