Forecast predicts 185 million people vaccinated in the US by September. But it warns about a winter surge

The US will likely reach its Covid-19 vaccination goals for the summer, but vaccine hesitancy and variants could still cause a surge in the winter, according to an influential model forecast released Thursday.The US will likely reach its Covid-19 vaccination goals for the summer, but vaccine hesitancy and variants could still cause a surge in the winter, according to an influential model forecast released Thursday.