UN agency urges acceleration of vaccination of high-priority groups to tackle spread of variant November 29, 2021.- The Omicron coronavirus variant is …
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High contagiousness levels of the Delta strain could affect the youngest
Its high transmissibility affects anyone who is not vaccinated, experts say MÉRIDA, Yucatán, (August 07, 2021) .- With the case of the 15-year – old …