Delta variant
Immune response induced by Omicron effectively neutralise Delta variant: ICMR study
The main limitation of this study are lesser participants in the unvaccinated group and the shorter window period post infection
Omicron more infectious than Delta variant: Medanta Hospital senior surgeon
Omicron shows higher vaccine unresponsiveness and vaccine failure, the surgeon said
Omicron quickly overtaking Delta globally in terms of circulation: WHO
Omicron is becoming the dominant variant that is being detected
Omicron will soon replace Delta as dominant global variant: Experts
The new variant was first detected in South Africa on November 11, and spread across more than 110 countries
WHO warns of 'toxic mix' as EU chief mulls mandatory Covid jabs
Saudi Arabia and the United Arab Emirates also recorded their first cases of Omicron, making the Gulf the latest region to be affected
Delta remains main Covid variant of concern, others negligible in sequencing data
Delta, which was first detected in India in October last year, led to the devastating second wave
New Zealand Covid cases hit record despite vaccination push
Health authorities announced 94 new virus cases, exceeding the previous daily record of 89 set in April last year during the first wave
India worried about complacency over second dose of COVID-19 vaccine - sources
India has administered more than 744 million vaccine doses, with 60% of its adults getting a first shot and 19% fully vaccinated
Increased infectivity, ability to escape immunity drove Delta variant: Study
The Delta variant is more efficient at breaking into the cells compared with other variants
New Zealand has biggest COVID-19 case day in over a year
The government put the nation into a strict lockdown last week as it tries to stamp out the outbreak, which has grown to 277 infections