Avon and Wiltshire Mental Health Partnership NHS Trust was caring for seven coronavirus patients in hospital as of Wednesday, figures show.
NHS England data shows the number of people being treated in hospital for Covid-19 by 8am on January 18 was down from 12 on the same day the previous week.
There were nine beds occupied by Covid-19 patients four weeks ago in Avon and Wiltshire Mental Health Partnership NHS Trust.
Across England there were 6,299 people in hospital with Covid as of January 18, with 146 of them in mechanical ventilation beds.
The number of Covid-19 patients hospitalised nationally has decreased by 27% in the last four weeks, while the number on mechanical ventilators has decreased by 16%.
The figures also show that five new Covid patients were admitted to hospital in Avon and Wiltshire Mental Health Partnership NHS Trust in the week to January 16. This was up from three in the previous seven days.