In a major lapse, 20 villagers in the eastern Uttar Pradesh district of Siddharthnagar were administered the Covishield vaccine in their first dose but given a Covaxin shot in the second. However, he was given a shot of Covaxin on May 14 during his second dose. While he said the 20 people administered the wrong vaccine shots did not face any problems, he was monitoring them. The Oxford group, which developed the AstraZeneca vaccine, is also testing combinations of the Moderna and Novavax vaccines. During phase-3 trials of the AstraZeneca vaccine in the United Kingdom, some participants were accidentally given half the intended dose due to a manufacturing error.

Source: The Hindu May 26, 2021 12:17 UTC