Rapid Spread of COVID Subvariant JN.1 Raises Concerns in US and Northeast

The JN.1 subvariant of the coronavirus is rapidly spreading in the US and has become dominant in the Northeast, causing about 20% of new infections nationwide. Descended from the BA.2.86 subvariant, JN.1 has only one change to its spike protein but is proving to be a fitter and faster virus. Studies suggest a twofold decrease in the ability of antibodies to neutralize JN.1, potentially leading to another wave of infections. The subvariant is growing quickly in several countries, including Europe, Australia, Asia, and Canada. Waning immunity and low vaccination rates contribute to its spread. The current Covid-19 vaccine offers good protection against JN.1 and its offshoots, emphasizing the importance of vaccination.