The originating country of the coronavirus, China has developed the vaccine called ‘Coronavac’. The Brazilian researchers after intensive clinical trials have found the vaccine to be 50.4% effective. It is contradictory to previous data which showed the vaccine to be more than 50% effective.
Researchers at the Butantan Institute conducted trials last week and found the vaccine to be 78% effective for ‘mild-to-severe’ cases. But on Tuesday it was revealed that the calculations did not include the data received by the patients with ‘very mild infections’. After the inclusion, the efficacy is now 50.4% said the researchers.
The vaccine has shown different results in several countries.
Last month Turkish researchers said the Sinovac vaccine was 91.25% effective, while Indonesia, said it was 65.3% effective.
The vaccine is developed by a Beijing-based biopharmaceutical company named Sinovac. It works by using killed viral particles to expose the body’s immune system to the virus without risking a serious disease response.
Brazil being one of the worst coronavirus hit countries has lined up the Chinese vaccine for its citizens. Several other countries, including Indonesia, Turkey, and Singapore, have placed orders for the vaccine.
The country currently has the third-highest number of Covid-19 cases in the world at over 8.1 million, just behind the US and India.