The United States has reported a three per cent decline in new cases of Covid-19 last week, a much smaller drop than in the previous six weeks, and health officials warned that progress against the global pandemic was stalling.

New cases fell as much as 25pc in the week ended Feb 7 and 23pc in the week ended Feb 21, before plateauing last week, according to a Reuters analysis of US state and county reports.

The country logged an average of over 68,000 new cases per day for the week ended Feb 28, with deaths averaging at 2,055 per day.