In the past few weeks, the world has recorded a sudden increase in the number of Covid-19 cases, mainly related to the JN.1 variant. This variant is highly infectious and is considered a “variant of concern” by the World Health Organization (WHO).

JN.1 is derived from BA.2.86, a sub-strain of Omicron. It possesses a distinct mutation in the spike protein (responsible for entering and infecting cells) and mutations in other regions. According to the latest data from the UK, this is the fastest growing variant, with a weekly rate of 84.2%.

The health monitoring application ZOE Health Study says the 5 most common symptoms of JN.1 are runny nose, sore throat, headache, sleep disturbance and restlessness. Other symptoms include fever with muscle pain, loss of appetite, fatigue, nausea and vomiting, and persistent cough.

Experts recommend that people with symptoms, especially when JN.1 spreads rapidly, should consult a doctor for support. At the same time, everyone should comply with public health measures such as wearing masks and keeping distance in crowded places. Vigilance, early detection and flexible response are very important in managing and minimizing the impact of mutations.

WHO has not yet made a statement on the severity of the patient after being infected with JN.1. However, research published in the journal Cell in early January showed that JN.1 can infect cells in the lower lung area, making symptoms worse. According to experts, JN.1 adheres to cells more effectively and participates in host cell membrane fusion.