Health experts are expressing concern over a new COVID-19 variant, NB.1.8.1, which is believed to be more transmissible than previous strains. This variant has been detected in 22 countries, including the UK, where case numbers are rising. (thescottishsun.co.uk, gbnews.com)
NB.1.8.1 has been designated a “variant under monitoring” by the World Health Organization (WHO) due to its rapid global spread and key mutations. The variant was first identified in samples collected in January 2025 and, by April, accounted for approximately 10.7% of sequenced cases from the 22 countries where it has been detected. (thescottishsun.co.uk)
The variant has been identified in popular tourist destinations such as Egypt, the Maldives, Thailand, and Ireland, as well as in parts of Europe, the US, Australia, and the UK. In Thailand, health authorities have reported over 257,000 cases and 52 deaths, attributing the surge to international travel and the rainy season. (thescottishsun.co.uk)
Symptoms of NB.1.8.1 are similar to those of Omicron subvariants and include sore throat, fatigue, fever, mild cough, muscle aches, nasal congestion, and, in some cases, gastrointestinal issues such as nausea, vomiting, and diarrhea. (thescottishsun.co.uk)
Despite its increased transmissibility, current data do not indicate that NB.1.8.1 leads to more severe illness than other variants. The WHO has stated that existing COVID-19 vaccines are expected to remain effective against this variant in preventing symptomatic and severe disease. (thescottishsun.co.uk)
Health experts recommend maintaining preventive measures such as regular hand washing, wearing masks in crowded places, and staying up to date with COVID-19 vaccinations, including booster shots when eligible. Individuals experiencing symptoms consistent with COVID-19 are advised to stay at home, rest, stay hydrated, and avoid contact with others, particularly those who are vulnerable. (thescottishsun.co.uk)
In the UK, COVID-19 cases have more than doubled since January 2025, rising from a 2.2% positivity rate to 4.5% by April 6, with hospitalizations up 7%. Experts attribute this surge to more transmissible variants like NB.1.8.1, waning immunity, seasonal changes, and increased indoor gatherings. (thesun.co.uk)
While a pandemic-level crisis is unlikely due to widespread immunity and available treatments, experts warn that infection rates may continue to rise and that new variants remain a concern. Public health authorities emphasize the importance of vigilance and adherence to preventive measures to manage the ongoing threat. (thesun.co.uk)
