The Omicron coronavirus subvariant JN.1 now makes up 44.2% of COVID cases in the United States, according to the CDC.
More than 1.6 million cases of reinfection have been reported across 24 states since data collection began, according to an ABC analysis.
Researchers found eye-opening characteristics of how COVID-19 is infecting the human body with omicron versus delta variants.
Pfizer released long-awaited data for their vaccine for children 6 months to under 5 years old on Monday morning.
A summer surge could be coming as a new sub omicron variant begins to infect people. A Houston health expert said the variant is the most infectious yet.
"This (BA.2.12.1) is now the most transmissible subvariant we have of all," said Dr. Monica Gandhi of UCSF. "It now looks like it's 30% more transmissible than BA.2 alone."