'Attractive option'CoronaVac is one of three experimental COVID-19 vaccines China has been using to inoculate hundreds of thousands of people under an emergency use programme.The two other vaccines in China's emergency programme, both developed by institutes linked to Sinopharm, and another vaccine from CanSino Biologics <6185.HK>, were also shown to be safe and triggered immune responses in early and mid-stage trials, according to peer-reviewed papers.Gang Zeng, a Sinovac researcher involved in the CoronaVac study, said the vaccine could be an attractive option because it can be stored at normal fridge temperatures of 2 to 8 degrees Celsius (36°-46°F) and may remain stable for up to three years."(It) would offer some advantages for.