Last year's £849m meal subsidy has been criticised for possibly leading to an increase in Covid-19 infections.
While infections across the country have fallen by two thirds since January, some areas are showing worrying trends.
The biggest increase in infections is in Rutland where they have surged by 87%.
For people with diabetes, foot ulcers and infections can develop and deteriorate quickly to more advanced foot disease.
There was an even more dramatic drop in the north of the country, researchers found.
Infectious diseases expert John Edmunds also warns against "unwise" Eat Out To Help Out-style easing of restrictions after England's lockdown.
Michael Osterholm, an expert at the University of Minnesota, stressed that a lack of public confidence is largely to blame.
Whitehall has been urged to take stronger action as infections increase dramatically, with 17,540 lab-confirmed cases reported on Thursday.
Doctors not involved in treating the president said the fact that he is on the steroid dexamethasone means his coronavirus infection is severe.
Government could also introduce more 10pm curfews on pubs and restaurants following dramatic spike of infections in the under-30s.