Moderna said on Thursday it is boosting manufacturing capacity for its COVID-19 vaccine and expects to make up to 3 billion doses in 2022, more than twice its previous forecast.It also said it is increasing its expectations for 2021 vaccine production to between 800 million and 1 billion shots, raising the bottom of its range from 700 million.The final number of inoculations will depend on how many are lower-dose formulations for boosters and immunizations for children.