The European Medicines Agency has warned that repeating additional doses of the coronavirus vaccine may have a negative effect on immunity and may not be sustainable.
Repeating the increased dose every four months can weaken the immune response and kill people, the European Medicines Agency (EMA) said.
Instead, states should take longer breaks between boosts and tie them to the colder season, much like the flu vaccine, according to the agency, according to Bloomberg.
This recommendation comes at a time when in some countries the possibility of a second boost dose of the vaccine or a total of a fourth dose due to the emergence of the omicron variant is being considered.
Recently, Israel was the first to introduce a second enhanced dose for people over 60 years of age.
It has been reported in the United Kingdom that the booster dose provides a good level of protection and that no other booster is currently needed, but that they will review the data.
“Booster doses can be given once, maybe twice, but they should not be repeated. “We need to think about how to move from the current pandemic to an endemic state,” said Marco Cavalieri, head of EMA’s Department of Biological Hazards and Vaccination Strategy.
EMA added that they could approve new vaccines targeting specific variants as early as April, which was announced by some pharmaceutical companies as the process takes three to four months.