"lancet"

China earlier this month, authorised the emergency use of CoronaVac, for children aged between 3 and 17 years.

The study led by University of Oxford researchers, earlier this year, began to investigate the effect of alternate doses of the Oxford-AstraZeneca vaccine and the Pfizer vaccine.

The report recommended complete closure of indoor spaces including office buildings, schools, restaurants with indoor dining, shops, malls and places of worship

People who were underweight (BMI less than 18.5) also experienced worse outcomes from COVID-19.

Strong leadership and decentralised strategies is what we need until we can get more vaccines into people’s arms

"Our study confirms what a number of others appeared to suggest: reinfection with Covid-19 is rare in younger, healthy people, but the elderly are at greater risk of catching it again," said researcher

Past trial results have found that the vaccine induces antibody and T cell immune responses, and is safe in adults aged 18 years and over, including older adults, the study noted.