The theory has some support from the world of health see below however it comes with a caveat at the end :
"""His proposal was backed up by Professor David Salisbury, the man in charge of immunisation at the Department of Health until 2013.
He told Today the numbers were "straightforward".
"You give one dose you get 91% [protection] you give two doses and you get 95% - you are only gaining 4% for giving the second dose," he said.
"With current circumstances, I would strongly urge you to use as many first doses as you possibly can for risk groups and only after you have done all of that come back with second doses."
However, he acknowledged this would be harder to do with the Oxford University vaccine, where the efficacy of two doses is 60%.""