Deputy Chief Scientific Advisor Angela Mclean at daily coronavirus press briefing

The video discusses the impact of staying at home on public transport usage, showing a significant decline since March. It highlights the public's response to government calls to protect the NHS by staying home. The video also presents data on COVID-19 cases in the UK, showing a stabilization in the number of cases due to testing efforts for key workers and their households.

What does the graph indicate about the number of COVID-19 cases from March 21st to April 20th?

What relief is expressed regarding the COVID-19 case numbers in the text?