A more contagious form of the omicron variant is now spreading in Missouri.
Weekly testing through Missouri鈥檚 Sewershed Surveillance Project has detected the BA.2 coronavirus subvariant in samples. Local officials have confirmed the subvariant is spreading in St. Louis County and warn of a possible rise in coronavirus cases in the next several weeks.
The subvariant is about 30% more transmissible than the original omicron variant and is fueling a surge in coronavirus cases and hospitalizations in Europe.
Officials with the Centers for Disease Control and Prevention estimate the subvariant is responsible for about of all new cases in the U.S.
The original omicron variant remains dominant in Missouri, Iowa, Kansas and Nebraska. But in the Northeast, the subvariant accounts for more than half of COVID-19 cases.
The rise of the new, more contagious subvariant is 鈥減art of the nature of the pandemic,鈥� said Dr. Clay Dunagan, co-leader of the St. Louis Metropolitan Pandemic Task Force.
鈥淎ny virus that replicates better, transmits better than the previous one is going to win out and take over, and that鈥檚 what we鈥檙e going to see,鈥� Dunagan said.
Missouri health officials have linked some cases of COVID-19 in St. Louis County to the BA.2 subvariant, County Executive Sam Page said during a press conference Wednesday. Page did not specify the number of cases or when the new subvariant was first detected in the county.
Despite its rapid spread across the U.S., the subvariant does not appear to cause more severe illness than other forms of the coronavirus.
鈥淓arly indicators show that it鈥檚 more transmissible than omicron, however, vaccination and prior infection with omicron do seem to be protective against this new subvariant,鈥� Page said.
County health officials are monitoring the spread of the subvariant, but Page said they do not yet have plans to reinstate a mask mandate or other public health orders.
鈥淔or us to do that, we would have to see a significant surge that looks a lot like what we鈥檝e seen in the past,鈥� Page said. 鈥淩ight now we don鈥檛 expect that, but we do expect cases to go up in the coming weeks.鈥�
Follow Shahla on Twitter:
