An inventor from Snowdonia has received a donation of $1.4m from Microsoft founder Bill Gates to develop a fridge that keep vaccines cool without using electricity.
ITV News first met Ian Tansley in 2011, when he demonstrated the technology for the first time.
The fridges - which can operate for weeks without needing power - are currently in operation in more than 30 countries.
The money will allow the Tywyn-based firm to start trials in East and West Africa.
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