The Delta variant of Covid-19, identified in at least 85 countries, is the most transmissible of the variants identified so far and is spreading rapidly among unvaccinated populations, WHO Chief Tedros Adhanom Ghebreyesus has warned.

Briefing a Press note of World Health Organisation in Geneva on Friday, Tedros said: ''I know that globally there is currently a lot of concern about the Delta variant, and the WHO is concerned about it too. "Delta is the most transmissible of the variants identified so far, has been identified in at least 85 countries, and is spreading rapidly among unvaccinated populations."  He noted with concern that as some countries ease public health and social measures, "we are starting to see increases in transmission around the world. "More cases mean more hospitalizations, further stretching health workers and health systems, which increases the risk of death," he said.

While pointing out that new Covid-19 variants are expected and will continue to be reported, that's what viruses do, they evolve - but we can prevent the emergence of variants by preventing transmission.

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