A handout photograph taken and released by the World Health Organisation (WHO) on May 24, 2021, shows

The Delta variant, the most contagious of the variants of the coronavirus that causes Covid-19 and dominant in the world, reduced to 40% the effectiveness of vaccines against the transmission of the infection, warned this Wednesday the World Health Organization (WHO).

“There are data to suggest that before the arrival of the Delta variant, vaccines reduced transmission by about 60%, with Delta tal having dropped to 40%,” WHO Director General Tedros Adhanom Ghebreyesus said during the video press conference regular report on the evolution of the Covid-19 pandemic.

Circulating Covid-19 vaccines prevent serious illness and death, but they do not prevent infection and transmission of the SARS-CoV-2 coronavirus, a situation that experts and the WHO have repeatedly warned people about , even those vaccinated, to maintain protective measures, such as hand washing, the use of masks and physical distance.

The Covid-19 pandemic has caused at least 5,165,289 deaths worldwide, among more than 258.29 million infections, according to the latest report by the news agency AFP.

In Portugal, since March 2020, 18,370 people have died and 1,130,370 cases of infection have been recorded, according to updated data from the General Directorate of Health.

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