Saumya Swaminathan, chief scientist at the World Health Organization (WHO), has described the use of mixed doses of coronavirus vaccines or switching to vaccines produced by different companies as a "dangerous trend". As an argument in favor of this statement, he said that there is no data-evidence about the results of vaccination or mixed dose application. A report by the news agency Reuters has given this information.
"It's a somewhat dangerous trend," the World Health Organization's chief scientist told an online briefing on Monday. We do not yet have any evidence of mixed doses of the vaccine.
Thailand, a Southeast Asian country, has changed its immunization policy after hundreds of health workers were infected with corona after receiving a full dose of China's Sinovac vaccine.
Thailand announced on Monday that if anyone had been vaccinated with Sinovac as the first dose, they would be given the second dose of AstraZeneca. And health workers who have been vaccinated with two doses of Sinovac will be vaccinated with AstraZeneca or Pfizer-BioNtech as booster doses.
Soumya Swaminathan, chief scientist at the World Health Organization, warned of a mixed dose of the vaccine after Thailand made the announcement. He said that if the citizens decide when to take the second, third and fourth dose of the vaccine, there will be chaos in the country.