BRASILIA (Reuters) - Pfizer Inc said on Wednesday it had offered to provide Brazil with millions of doses of a COVID-19 vaccine in the first half of 2021, amid evidence the coronavirus is spreading more rapidly in South America’s largest country. “Pfizer made a proposal to the Brazilian government, in line with deals we closed in other countries - including in Latin America, that would permit the vaccination of millions of Brazilians in the first half, subject to regulatory approval,” the company said in a statement.Brazil has the third-worst outbreak of coronavirus in the world by number of cases, after the United States and India. On Tuesday, the Imperial College London released data showing that the rate of infection in Brazil had accelerated to 1.1, meaning every 100 people with coronavirus infect 110 people. That is the first time in weeks the figure has been above one.