Dr Brendan Healy travelled to Sierra Leone in 2015 to help tackle the deadly Ebola outbreak that killed more than 11,000 people over three years.
The Swansea doctor risked his life to help contain the disease.
Whole families were wiped out. Lots of doctors and healthcare workers caught and died from Ebola. I remember the first thing I saw when I arrived in the hospital were posters of doctors who'd died as a consequence of having caught Ebola. It's concerning when you are out there that you might end up infected. I didn't think too much about being infected though because I was concentrating more on being careful not to catch it.
Dr Healy is a consultant in microbiology and infectious diseases and he's now using his experience from the crisis to prepare Welsh hospitals for any future outbreaks.
He's working with Public Health Wales and Welsh hospitals to offer the public the best possible protections from Ebola and other infectious diseases.
The risk of Ebola in Wales remains low, but in these days of international travel no-one can afford to be complacent, so we are always working to protect the public.
A vaccine developed with support from the UK Government's Department for International Development has been used to restrict the spread of the virus across west Africa.
When Dr Healy traveled to Sierra Leona the vaccine had not yet been developed but now over 190,000 people have received the treatment in the Democratic Republic of Congo where an Ebola epidemic has been declared.
Initial results suggest the the vaccine is 97% effective.
The UK Government has given £45m in response to the Democratic Republic of Congo epidemic and recently pledged a further £8m to prevent the spread into neighbouring countries.
Ebola has already taken far too many lives in the Democratic Republic of Congo. Shockingly, it has wiped out entire families and, a year after this outbreak started, it is showing no sign of slowing down.