The KP.2 strain, a subbranch of Omicron, is highly transmissible and able to evade immunity due to two unique mutations. This information was published on bioRxiv on May 4 before being peer-reviewed. KP.2 originated from JN.1 and has been responsible for about 25% of sequenced cases in the US since April 20-27, according to the CDC. This new variant has two additional distinct mutations compared to JN.1, giving it an advantage in transmission and immune evasion.
Experts, including infectious disease physicians and virologists, have noted that KP.2 is showing increased rates of infection compared to other variants. Laboratory research suggests that current vaccines may only provide partial protection against KP.2. However, it is still too early to issue any warnings that could cause panic in the community.
The emergence of new variants like KP.2 is part of the ongoing cycle of mutation and adaptation of the virus. Covid-19 mutates frequently, creating new strains that are highly contagious. Despite more than 97% of Americans having natural antibodies or vaccine-induced immunity against Covid-19, protection may fade over time. Maintaining high vaccination rates is crucial to preventing the spread of new mutations.
While it is uncertain whether mutations will lead to a surge in infections during the summer, the number of Covid-19 cases has been steadily increasing seasonally. The per capita positivity rate in the US has decreased since mid-January, indicating lower transmission levels.
However, experts caution that the virus circulation remains present at a moderate level throughout the year.
In conclusion, the emergence of new variants like KP.2 underscores the importance of ongoing vigilance and vaccination efforts to control the spread of Covid-19
