People over 80 who had an interval of 12 weeks between their first and second dose of the Pfizer corona vaccine produce more than three times as many antibodies as their peers who took a three-week break.
This is according to research from the University of Birmingham, which was published on Friday.
The investigation was done because the British government had announced that it would postpone the second shot.
For example, as many people as possible should be given the opportunity to receive their first dose as soon as possible.
The group of over-80s with an interval of twelve weeks had 3.5 times as many antibodies in their blood as the group in which there were three weeks between the two injections.
Both groups were equally well protected after the first injection.
The scientists believe that extending the period between injections will lead to longer protection against the corona virus.
The researchers think this probably also applies to younger people, although more research needs to be done.
It is not yet clear whether such a difference also occurs with corona vaccines from other manufacturers.
Second vaccination not only after twelve weeks: that's how the two Pfizer injections differ