Adams was born in Randalstown in what is now Northern Ireland. His parents were from a very strict Christian sect called the Plymouth Brethren - and they believed that what ever they did in life, they would go to heaven anyway. He had one brother, William, born in 1903. His father died in 1914 and Adams was brought up by his mother. The family moved to Belfast but in 1918 William died from flu. Adams studied medicine at university.