Royal Cornwall Hospitals NHS Trust was caring for 39 patients with coronavirus in hospital as of Wednesday, figures show.
NHS England data shows the number of people being treated in hospital with Covid-19 by 8am on March 22 was down from 45 on the same day the previous week.
The number of beds at Royal Cornwall Hospitals NHS Trust occupied by people who tested positive for Covid-19 increased in the last four weeks – 28 days ago, there were 24.
Across England there were 8,387 people in hospital with Covid as of March 22, with 172 of them in mechanical ventilation beds.
Nationally, the number of hospital patients with Covid-19 has increased by 5% in the last four weeks, while the number on mechanical ventilators has increased by 5%.
The figures also show that 39 new patients with Covid were admitted to hospital in Royal Cornwall Hospitals NHS Trust in the week to March 20. This was down from 46 in the previous seven days.