World Begins Mass Vaccination Against Covid-19 with Many Questions

Virologist Isabel Sola encourages the undecided to be vaccinated as soon as possible: "We need to have trust. The results we have are convincing: these vaccines are effective and safe. If we are not vaccinated, what alternative do we have?"

RIO DE JANEIRO, BRAZIL - British actor Sir Ian McKellen, 81, who portrayed the mythical wizard Gandalf in the Lord of the Rings films, was one of the first people last week to be administered an authorized vaccine against Covid-19.

"I am very happy to have been vaccinated. I wouldn't hesitate to recommend it to everyone," McKellen said on Thursday. The actor was administered 30 millionths of a gram of Tozinameran, a molecule containing genetic information of the novel coronavirus, in the left deltoid muscle.

This tiny injected formula contains instructions for the human cells to produce the genuine . . .

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