BA.2 is becoming more common in the US, as its circulation is up from 22.3% of all variants during the week that ended on March 12.
CDC isn't overly concerned as Avian Influenza outbreaks were found in domesticated flocks in Maryland, Missouri, Indiana, Connecticut and Iowa last week.
Governments around the world are scrambling to buy Paxlovid, while Merck's Molnupiravir has faced setbacks after disappointing trial data.
Hospitalizations have increased steadily since late December as Omicron quickly overtook Delta as the dominant strain of the coronavirus in the United States.
The CDC reported that children were experiencing systemic side effects like fatigue and headache and only very few suffered from myocarditis.
The Centers for Disease Control and Prevention also said the asymptomatic people after isolation should follow five days of wearing a mask when around others.
The CDC's move came after its Advisory Committee on Immunization voted unanimously to make the recommendation in favor of the vaccines made by Moderna Inc and Pfizer /BioNTech over the J&J shot.
The infected person was a traveler who returned to the United States from South Africa on Nov. 22 and tested positive seven days later and suffered mild symptoms, officials said.
It will take a couple more weeks until we have information on any unexpected side effects experienced by these children once they are fully vaccinated.
They said the benefits of vaccination outweigh the risks of the vaccine.