American health experts have wondered if 'continuous immunization' an effective long-term strategy in the fight against coronavirus. The question comes as a number of states, including Israel, are proposing a fourth COVID vaccine for the population.
In an interview with The New York Times, scientists said that periodically offering additional vaccinations to the entire population does not seem viable. and it doesn't make scientific sense.
“Of course it doesn't seem like a sustainable long-term strategy,” said Dipta Bhattacharya, an immunologist at the University of Arizona.
According to scientists, the population may experience vaccine fatigue.
“I think there are better ways than getting boosted every six months,” said Akiko Iwasaki, an immunologist at Yale University. >
Experts also noted that an increased level of antibodies is not a guarantee against infection with the Omicron strain, and that immune stimulants may be temporary.
Even with so many antibodies, virologist Shane Cretti says, “It’s very difficult to stop the virus for a long time.”
An immunologist at the University of Washington, St. Louis, Ali Hellebedy, expressed the opinion that if it is necessary to add another vaccine, it is better wait for the dose to target the new strain.
Scott Hensley, an immunologist at the University of Pennsylvania, said the arrival of Omicron changed his stance on boosters, but he doesn't think there is much reason to follow Israel and suggest the fourth dose, because other immune cells remained effective against the virus after three or even two shots.
The article also notes that there is no data yet on whether the fourth dose of the vaccine is effective.
Meanwhile, in Israel, a study is underway on the 4th dose of the vaccine, its effectiveness. Professor Gili Regev, head of the Department of Infectious Disease Prevention at Sheba Hospital, said that it is not worth rushing with the 4th dose for now. She also noted that the experts expected more at the beginning of the research.