The WHO called for the development of new vaccines with greater resistance to infection, saying multiple booster doses of existing vaccines was not a sustainable strategy.
“The vaccination strategy based on repeated booster doses of existing vaccines does not appear to be appropriate or sustainable,” said the World Health Organization (WHO) advisory group on Covid-19 vaccine preparations ( TAG-Co-VAC) issued a statement on January 11.
TAG-Co-VAC calls for adjusting existing vaccines to enhance effectiveness against raging strains, such as the Omicron strain that has spread rapidly and appeared in 149 countries and territories.
According to WHO experts, it is advisable to develop a new vaccine that is not only able to protect the injector from the risk of severe disease, but also protects the injector from the risk of virus infection more effectively.
TAG-Co-VAC believes that this vaccine will reduce community transmission and help relax strict and widespread anti-epidemic measures. The WHO expert also suggested that manufacturers develop vaccines that “generate good and long-lasting immunity to reduce the need for consecutive booster shots”.
According to WHO, 331 vaccine candidates are being studied around the world.
TAG-Co-VAC added that until a new vaccine is developed, existing Covid-19 vaccines may need adjustment. “This is to ensure that vaccines continue to provide protection to the injector from the risk of infection and progression from the strains of concern, such as the Omicron strain and later strains,” TAG-Co-VAC said. confirm.
WHO has approved nine Covid-19 vaccines. TAG-Co-VAC emphasizes that these vaccines are still highly effective in preventing the risk of morbidity and mortality from these strains.
Figures from AFP shows that more than 8 billion doses of Covid-19 vaccine have been administered in at least 219 countries and territories. According to United Nations figures, while more than 67% of people in high-income countries have received at least one dose of the Covid-19 vaccine, the figure in low-income countries is less than 11%.
Ngoc Anh (Follow AFP)