The prime minister has urged people to avoid unnecessary social contact, whilst avoiding pubs, bars, clubs and theatres in order to stop the spread of coronavirus.
Those considered high-risk will soon be asked to stay home for a period of up to three months to prevent them catching Covid-19.
As cases in Wales and the rest of the UK continue to rise, the advice for the public who are experiencing symptoms of coronavirus has changed.
What is the latest advice?
People no longer need to contact NHS 111 if they think they may have contracted Novel Coronavirus (COVID-19).
Instead, anyone who has a high temperature or a new continuous cough should stay at home for seven days.
If you live with other people, they should stay at home for 14 days from the day the first person got symptoms
They should not go to a GP surgery, pharmacy or hospital.
What if I'm not getting any better and cannot cope with my symptoms?
If you feel like you cannot cope with symptoms at home and your health is not improving, you should contact NHS 111.
Public Health Wales said it is working closely with health boards, NHS 111 and the Welsh Government towards transitioning away from community testing and contact tracing.
Testing is now focused on cases admitted to hospital, in line with national guidance, and based on symptoms and severity.
“The move away from community testing gives us greater capacity to test in hospital settings, where the most vulnerable patients will be cared for", Dr Giri Shankar at Public Health Wales said.
“While there is no longer a need to identify every case through community testing, we will still need to and will be able to report on Novel Coronavirus level in Wales. In a similar way to our seasonal flu reporting, we will be undertaking routine coronavirus surveillance which will help us understand the picture in Wales."
Want to check the number of cases in your area?
How to avoid catching or spreading coronavirus:
Wash your hands with soap and water often – do this for at least 20 seconds
Always wash your hands when you get home or into work
Use hand sanitiser gel if soap and water are not available
Cover your mouth and nose with a tissue or your sleeve (not your hands) when you cough or sneeze
Put used tissues in the bin immediately and wash your hands afterwards
Try to avoid close contact with people who are unwell