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A white passenger airplane is shown from the front on a reflective surface, with the logos of United, American Airlines, British Airways, Emirates, Delta, and Southwest airlines displayed above it.

World’s most valuable airline brands 2025

Mohammad Shamsudduha. Photo: Courtesy

The miracle in the Delta: Bangladeshi scientist who discovered Bengal Water Machine

I started walking in the early morning. Before the sun sets, I return to our village. I walk miles after miles and sell homemade crackers. My husband died 35 years ago. My only daughter is severely ill. Photo: Mohammad Rakibul Hasan

The last savings at Bengal Delta

Test tube labelled "Covid-19 Omicron variant test positive" is seen in this illustration picture taken 15 January, 2022. PHOTO: REUTERS/Dado Ruvic/Illustration

Covid is less severe with Omicron than Delta, US study suggests

A healthcare professional administers a booster vaccine at a coronavirus disease (Covid-19) pop-up vaccination centre at Wembley Stadium in London, Britain, December 19, 2021. Photo : Reuters

Natural immunity more potent than vaccines during US Delta wave: study

Illustration: Collected

Covid-19: 10 more districts flagged 'red zones' as cases keep surging 

Omicron less severe than Delta but still poses danger for unvaccinated: WHO

Omicron less severe than Delta but still poses danger for unvaccinated: WHO

A doctor shows vials of Biontech-Pfizer's Comirnaty vaccine against Covid-19 at the Institute for Health and Food Safety of Zenica, Bosnia and Herzegovina, December 16, 2021. Photo :Reuters

Omicron evades immunity better than Delta, Danish study finds

Representational image.(HT Photo)

Case data, vaccine news mark small victories in Omicron battle

A logo is pictured on the headquarters of the World Health Orgnaization (WHO) in Geneva, Switzerland, June 25, 2020. Photo :Reuters

WHO: still too soon to say if Omicron more transmissible than Delta

Photo: Collected

Lower risk of hospitalisation with Omicron versus Delta: South African study

A nurse tends to a COVID-19 patient during a tour of SSM Health St. Anthony Hospital's intensive care unit (ICU) amid the coronavirus disease (COVID-19) pandemic in Oklahoma City, Oklahoma, U.S., August 24, 2021. REUTERS/Nick Oxford

US crosses 50 million Covid-19 cases as Delta dominates amid Omicron emergence

Representational photo.

Delta still dominates say experts urging third jab