The US Food and Drug Administration is ready today to modify the emergency licenses for the Pfizer and Moderna vaccines for Covid-19 to allow people with weakened immune systems to take a third dose.
The decision was made in July after a meeting of a group of consultants at the Centers for Disease Control and Prevention, which requested additional doses for immunocompromised adults. (The immune system is inadequate, with the result that the body's ability to fight pathogenic germs, parasites and viruses is limited or completely absent)
Doctors say that despite being vaccinated , more and more patients are still vulnerable to the coronavirus because they may not have an effective immune response to the vaccines.
About 2.7% of adults in the United States are immunosuppressed, a group that includes people undergoing cancer treatment, organ transplants or HIV, among others, according to the Centers for Disease Control and Prevention.
In July, Israel became the first country to offer boosters for people with weakened immune systems and the elderly.
Germany and the United Kingdom have also announced plans to offer third installments from September.
The World Health Organization has called for a moratorium on booster doses until at least September to allow poorer countries to access doses.