Johnson tweets from hospital, minister at Downing St

Britain Prime Minister Boris Johnson is reportedly in good spirits following his first night in the hospital for what his office described as a “precautionary step” after contracting the new coronavirus.

Johnson remains in charge of government despite being sent to St Thomas’ Hospital after COVID-19 symptoms of a cough and fever persisted.

His spokesman James Slack said he remains in hospital under observation.

"I'm in good spirits and keeping in touch with my team, as we work together to fight this virus and keep everyone safe," Johnson himself tweeted from hospital.

"I'd like to say thank you to all the brilliant NHS (National Health Service) staff taking care of me and others in this difficult time. You are the best of Britain."

For most people, the new coronavirus causes mild or moderate symptoms, such as fever and cough that clear up in two to three weeks.

For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia, and could lead to death.

The vast majority of people recover.

The 55-year-old Johnson had been quarantined in his Downing Street residence since being diagnosed with COVID-19 on March 26.

He is the first known current head of government to fall ill with the virus.

He has released several video messages during his 10 days in isolation.