Source: BBC
Brain - Polio in Nigeria: 'I opposed vaccinations until my son caught polio'
Key Highlights

He now campaigns for child vaccination

There are instances of reluctance to accept the measles vaccine in parts of Europe, and the US, the human papillomavirus vaccine in Japan and India and the polio vaccine in parts of Pakistan

Children should get at least six vaccines against killer diseases

There are more than enough vaccines

But health workers there struggle to persuade parents to let their children have them

"My father had 13 without vaccination and I thought if they could survive without vaccination then mine could too," said Mr Misa

BBC News