But now it has been decided that the priority will be to give as many people as possible a first dose, with the second dose not needed until as many as 12 weeks later. This clearly showed that maximum immunity (95 per cent) was not reached until seven days after the second dose. In addition, patients who have already had a first dose gave their consent specifically for a two-dose regime separated by 21 days. It was emphasised to them how important it was that they returned for the second dose. And the science in relation to this vaccine says two doses separated by 21 days.

Source: Daily Mail January 06, 2021 23:00 UTC