The United States on Monday authorized the Pfizer-BioNTech COVID-19 vaccine for children between 12 and 15 years of age. The Food and Drug Administration of America (FDA) had earlier approved its use for people up to the age of 16 years. Now its dose can also be administered to children between the age of 12 to 15 years. President Joe Biden called it an important step in the war against COVID-19 pandemic. Meanwhile, the World Health Organization (WHO) has classified COVID’s Indian variant (B-1617) as a ‘worrying form’ globally. According to experts, children will be most affected during the third wave of coronavirus in India.