29 April 2021 - 08:31 By TimesLIVE Moderna's two-dose vaccine uses messenger-RNA technology that programs cells to build immunity to the novel coronavirus. File photo. Image: Cooper Neill/Reuters Moderna boosting Covid-19 vaccine-making capacity, targets up to 3 billion shots in 2022 Moderna Inc 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 immunisation for children. Moderna shots currently deploy 100 micrograms of vaccine substance but some future shots may use only 50 micrograms.