Introduction
Covid-19 cases have surged across Asia in 2025, driven primarily by the JN.1 variant, a subvariant of the Omicron lineage. Densely populated regions including Hong Kong, Singapore, Thailand, and China are reporting significant increases in infections. This blog explores the rise in cases, the countries most affected, and the health measures being recommended amid this new wave.
Covid-19 Surge Across Asia: The Most Affected Countries
Health authorities in Asia are closely monitoring a resurgence of Covid-19 infections. The JN.1 variant has contributed to rising case numbers, prompting governments to urge vaccinations and booster doses to curb the spread.
Hong Kong
According to Hong Kong’s Center for Health Protection, viral activity is now “quite high.” Respiratory samples testing positive for Covid-19 have recently reached their highest level in a year. In the week ending May 3, severe cases hit a 12-month peak with 31 reported. Rising viral loads in sewage and increased hospitalizations confirm active community transmission in this city of over 7 million people. Hong Kong Center for Health Protection
Singapore
Singapore’s Ministry of Health reported a 28% jump in Covid-19 cases, reaching 14,200 in the week ending May 3. Daily hospitalizations have also risen by 30%. Notably, the government released these figures publicly for the first time in nearly a year, indicating a notable spike. However, health officials emphasized there is no evidence that the JN.1 variant is more transmissible or causes more severe disease than earlier Omicron subvariants. Singapore Ministry of Health
Thailand
Thailand experienced a doubling of Covid-19 cases to 33,030 in the week ending May 17, up from 16,000 the prior week. Bangkok reported the highest numbers, followed by Chon Buri, Rayong, and Nonthaburi. Most infections are in people aged 30 to 39. The resurgence followed the Songkran festival, which involved large gatherings believed to have accelerated transmission. Authorities are urging high-risk groups to get booster vaccinations promptly. Thailand Department of Disease Control
China
China’s Center for Disease Control and Prevention reported a sharp rise in Covid-19 positivity rates among outpatient and hospitalized influenza-like illness cases, increasing from 7.5% to 16.2% and 3.3% to 6.3%, respectively, between March 31 and May 4. This uptick is seen as a warning that China may face a wave similar to last summer’s outbreak. China CDC
India
India has reported a slight increase in active Covid-19 cases, with 257 cases noted recently. While no outbreak signs have emerged, the Ministry of Health and Family Welfare continues to monitor the situation closely. Ministry of Health and Family Welfare, India
The JN.1 Variant: What We Know
The JN.1 variant, part of the Omicron family, is driving the current surge across Asia. The World Health Organization (WHO) has classified JN.1 as a “variant of interest” but not yet a “variant of concern.” This classification means it is being monitored closely but there is no conclusive evidence that JN.1 causes more severe illness or increased transmissibility compared to earlier subvariants. WHO SARS-CoV-2 Variant Tracking
Health Recommendations and Next Steps
Health officials across Asia are urging the public, especially vulnerable and high-risk groups, to receive Covid-19 booster vaccinations as soon as possible. Continued surveillance and testing are vital to contain the spread. Public adherence to preventive measures such as mask-wearing, avoiding large gatherings, and maintaining hygiene remains crucial.
Conclusion
The resurgence of Covid-19 cases in Asia linked to the JN.1 variant highlights the ongoing need for vigilance and vaccination efforts. While current evidence does not indicate a more dangerous strain, the rapid rise in infections in densely populated cities calls for proactive public health responses.
Stay informed and follow official guidance to protect yourself and your community.
For more detailed updates, visit the Covid-19 Vaccination Drive Updates and the WHO Covid-19 Variant Tracker.
