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.
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.
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.