COVID NB.1.8.1 Variant Not More Severe: DDC

Khaosod•Society•5d ago

Reader Briefing

Thailand's Department of Disease Control confirms the COVID-19 NB.1.8.1 variant is not causing more severe illness or higher death risks, despite increased transmissibility, and is closely monitoring the situation.

•The Department of Disease Control (DDC) in Thailand has stated that the NB.1.8.1 COVID-19 variant does not show signs of causing more severe illness or a higher risk of death.
•While this variant may have mutations that increase its spread and ability to evade immunity, current data does not support increased severity.
•The DDC continues to actively monitor COVID-19 cases and variants through various surveillance systems.
•As of June 2, 2026, there were 4,156 COVID-19 cases and 1 death reported, with the 30-39 age group most affected.

Overview

•Between January 1, 2025, and April 23, 2026, NB.1.8.1 was the primary variant detected in Thailand at 50.95%, due to its increased detection rate.
•NB.1.8.1 has been detected and circulating continuously in Thailand since mid-2025, providing ongoing data for analysis.
•The Department of Disease Control affirmed that current data has not revealed any indications that the NB.1.8.1 variant causes disease severity different from previously circulating strains, in order to reassure the public.
•On June 2, 2026, the digital disease surveillance system recorded 4,156 COVID-19 cases and 1 death, reflecting the current caseload.
•The NB.1.8.1 variant has mutations that improve its transmissibility and immune evasion capabilities, necessitating continued monitoring.
•The NB.1.8.1 variant has been the main strain found in Thailand continuously since mid-2025, indicating its sustained presence.
•The DDC recommends individuals maintain personal hygiene, wear masks in crowded places or when symptomatic, and avoid close contact with vulnerable groups to reduce transmission risk.
•Despite mutations that enhance spread, current epidemiological and clinical data for NB.1.8.1 do not show increased severity or mortality risk compared to previous strains, according to the DDC.

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Key Quotes

N.P. Montien Kanasawat

"Current data shows no signs indicating that the NB.1.8.1 variant causes disease severity different from previously circulating strains."

ข้อมูลปัจจุบันยังไม่พบสัญญาณที่บ่งชี้ว่าสายพันธุ์ NB.1.8.1 ก่อให้เกิดความรุนแรงของโรคแตกต่างจากสายพันธุ์ที่เคยระบาดก่อนหน้านี้

N.P. Montien Kanasawat

"Although NB.1.8.1 has mutations enhancing transmissibility and immune evasion, current epidemiological and clinical data show no evidence it causes more severe symptoms or increases mortality risk."

แม้สายพันธุ์ NB.1.8.1 จะมีการกลายพันธุ์บางตำแหน่งที่ช่วยเพิ่มความสามารถในการแพร่กระจายและหลบหลีกภูมิคุ้มกันได้ดีขึ้น แต่จากข้อมูลทางระบาดวิทยาและข้อมูลทางคลินิกที่มีอยู่ในปัจจุบัน ยังไม่พบหลักฐานว่า ก่อให้เกิดอาการรุนแรงหรือเพิ่มความเสี่ยงต่อการเสียชีวิตมากกว่าสายพันธุ์ที่เคยระบาดก่อนหน้า

N.P. Direk Khampaen

"Current surveillance data shows no signs of widespread outbreaks or increased disease severity differing from seasonal trends."

จากข้อมูลการเฝ้าระวังในปัจจุบันยังไม่พบสัญญาณการระบาดในวงกว้างหรือการเพิ่มขึ้นของความรุนแรงของโรคที่แตกต่างจากแนวโน้มที่เคยพบในช่วงฤดูกาลที่ผ่านมา

Key Entities

Organization

Department of Disease Control(กรมควบคุมโรค)ℹ️

A Thai government organization responsible for public health surveillance and disease control.

Ministry of Public Health (MOPH)(กระทรวงสาธารณสุข (สธ.))ℹ️

The government ministry overseeing public health in Thailand, under which the Department of Disease Control operates.

Department of Medical Sciences(กรมวิทยาศาสตร์การแพทย์)ℹ️

A Thai government department responsible for scientific research and analysis, including genetic sequencing of viruses for variant identification.

Person

Dr. Montien Kanasawat(นพ.มณเฑียร คณาสวัสดิ์)

Director-General of the Department of Disease Control who provided updates on the COVID-19 situation.

Dr. Direk Khampaen(นพ.ดิเรก ขำแป้น)

Deputy Director-General of the Department of Disease Control who commented on the current COVID-19 outbreak situation.

Law

Digital Disease Surveillance System (DDS)(ระบบเฝ้าระวังโรคดิจิทัล (DDS))

A digital system used by the Department of Disease Control for monitoring and surveilling diseases, providing data on COVID-19 cases.