President Duterte received his first dose of COVID-19 vaccine from Chinese company Sinopharm last night. Sinopharm is one of the most expensive vaccines, but how different is it from other brands in terms of efficacy?
ADVERTISEMENT

President Duterte received his first dose of COVID-19 vaccine from Chinese company Sinopharm last night. Sinopharm is one of the most expensive vaccines, but how different is it from other brands in terms of efficacy?