The third dose should be given to people with moderate to severe immunodeficiency who have been vaccinated with the vaccine. Recognized by the WHO, people in both groups were at higher risk of contracting Kovid after two standard doses.
The World Health Organization (WHO) says an additional 19 doses of Kovid vaccine should be given to people aged 60 years or older with Sinovac or Sinopharm vaccine.
The WHO does not recommend the use of booster doses to address the effects of diminished efficacy or the effects of metabolic syndrome. Instead, they recommend boosting doses as part of a “supplemental vaccine” for the underprivileged group. Adequate immune response after 2 doses.