The NHS in Powys is asking people not to visit loved ones in hospital if they are unwell, have been unwell in the last 48 hours, or have had contact with people with diarrhoea, vomiting or flu-like symptoms in recent days.
Mererid Bowley, Executive Director of Public Health with Powys Teaching Health Board said: "We are currently seeing an increase in the number of people contracting the flu virus within our local communities.
"Although flu can be very nasty it will usually get better without the need to see a doctor or attend hospital. But it is a highly infectious illness, so we are urging people with symptoms to stay away from hospital to help stop the virus spreading.
"Hospital visitors also have an important role to play in preventing the spread of infection so if you, or someone within your household, is unwell with flu-like symptoms, diarrhoea, vomiting or any other infectious condition they should not visit friends or relatives in hospital and should ensure they have been clear of any symptoms for at least 48 hours before visiting."
Flu symptoms can come on very quickly and can include:
“I encourage everyone to stock up your home medicine cabinet. Medicine cabinet essentials such as paracetamol or ibuprofen can help lower your temperature and treat aches and pains. There is helpful advice available from the NHS 111 Wales website, and your local community pharmacist is an excellent source of advice and treatments,” added Mererid
"Most people will be able to manage their symptoms at home, without seeing a doctor, by getting plenty of rest, keeping warm and drinking plenty of water.
“But flu can be very serious for some people, and vaccination is the best defence.”
Anyone eligible for a free flu vaccine this winter, who has not yet booked their appointment, is also being urged to get their vaccination now.
Those eligible for flu vaccination include:
Flu vaccination is still available from some GP practices , and from community pharmacies. More information is available from the health board website at pthb.nhs.wales/flu
How to look after yourself if you have flu:
To reduce the risk of spreading flu:
To reduce the risk of spreading diarrhoea and vomiting infections: