The four most worrying coronavirus variants have been detected in virtually all countries and territories of the Americas, but although they are more transmissible there is no evidence they are more lethal, a World Health Organization expert said on Thursday.
The vaccines that are being administered in the region do provide more protection against the variants, Jairo Mendez, a WHO infectious diseases expert said in a webinar by the Pan American Health Organization (PAHO).
“What we still do not know is whether fully vaccinated people who do not become ill can still spread the virus to others. We have a lot to learn,” Mendez said.
The newest variant, the Indian B.1.617 variant, has been detected in cases in eight countries of the Americas, including Canada and the US, he said.
One case is under investigation, and others with the variants were travelers in Panama and Argentina who had arrived from India or Europe. In the Caribbean, cases of the Indian variant have been detected in Aruba, Dutch St Maarten and the French department of Guadeloupe.
The B.117 prevalent in the United Kingdom has been found in cases reported in 34 countries or territories in the Americas, while the South African variant B.1.351 has been reported in 17.
Brazil’s so-called Manaus variant P.1 has so far been detected in 21 countries, the WHO expert said.
“These variants have a greater capacity for transmission, but so far we have not found any collateral consequences,” Mendez said. “The only worry is that they spread faster.”
The variants are associated with higher mortality due to the increased number of cases of COVID-19 but not because the virus has mutated into a more lethal version, he said.
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