Thursday, December 2

COVID: FDA Authorizes Booster Dose of Moderna and Johnson & Johnson Vaccines; now they can be mixed



The US Food and Drug Administration (FDA) not only Authorized Booster Doses of Moderna and Johnson & Johnson COVID Vaccines, but now also allows the mixing of drugs under specific conditions and circumstances.

The agency modified the emergency use authorizations for COVID-19 vaccines to allow a single booster dose in the following particular cases.

For those who have already been fully vaccinated with Moderna’s drug

People who have completed the two doses of Moderna’s COVID vaccine at least six months ago may opt for reinforcement if:

-Are 65 years of age or older.

-They are between 18 and 64 years old but have a high risk of suffering severe COVID-19.

-They are between 18 and 64 years old but are frequently exposed to COVID due to their occupations.

Possible side effects: Moderna booster is half the dose given in a primary series dose. Possible side effects of the booster dose FDA designated They include pain at the injection site, tiredness, headache, muscle and / or joint pain, chills, swollen lymph nodes in the same arm as the injection, nausea and vomiting, and fever.

For those who were vaccinated with the Johnson & Johnson drug

People who have received a single dose of Janssen may receive a single booster dose if:

-At least two months have passed since the vaccination.

-They are over 18 years old.

Possible side effects: Although risks of a severe type of blood clot and low platelet levels have been identified after being vaccinated with Johnson & Johnson biologics, especially among women 18 to 49 years of age, as well as the likelihood of developing the known neurological disorder such as Guillain Barré syndrome within 42 days of vaccination, the FDA considers that “no new safety concerns have been identified.”

“Mix and match” de vacunas de COVID

For the booster dose, the FDA also now allows the use of a drug other than the one received in vaccination. “The FDA has determined that the known data and potential benefits of using a single heterologous booster dose outweigh the known and potential risks of its use in eligible populations,” the agency noted.

In other words, after completing the primary vaccination schedule with any of the COVID-19 vaccines available in the United States, it is possible to receive a different drug for the booster dose. For example, those who have been vaccinated with Janssen biologic and are 18 years of age or older, may receive a single booster dose of the same vaccine, Moderna (half dose), or Pfizer at least two months after they were given. vaccinated.

Who got vaccinated with Moderna or Pfizer and meet the specificities listed above can receive a booster dose of Moderna (half dose), or Pfizer, or Janssen if at least six months have passed after completing their primary vaccination.


Read more:

+ COVID: Should I get the third dose of the vaccine already?

+ 6 Common Side Effects of the Three Most Used COVID Vaccines in the World

+ A vaccine against 5 different coronaviruses: How it works


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