Those vaccinated with Pfizer / BioNTech against covid-19 show "significantly higher" levels of antibodies than those given Sinovac Biotech, the South China Morning Post reported today, citing research conducted in Hong Kong. .
Those vaccinated with Chinese Sinovac may need a third repeat dose, according to the newspaper, citing research professor Benjamin Cooling, an epidemiologist at the University of Hong Kong.
The study was conducted by the School of Public Health at the University of Hong Kong and examined the immune response of 1.000 people who had received either vaccine.
Indonesian authorities announced on Friday that more than 350 members of the country's medical staff had been infected with covid-19 despite receiving the Sinovac vaccine, with dozens of them in need of hospitalization, raising concerns about the efficacy of the Chinese vaccine against variant strains of coronavirus.
Earlier in June, Uruguay released real-life data on the effects of Sinovac on the country's population. According to them, this vaccine is more than 90% effective in preventing hospitalization in an intensive care unit and death from covid-19.
The study, conducted on behalf of the Uruguayan Ministry of Health, also looked at the effectiveness of the Pfizer / BioNTech vaccine among 162.047 health workers and people over the age of 80. According to her conclusions, this preparation is 94% effective in preventing hospitalization in an intensive care unit and death, while reducing the rate of infections by 78%.