This Parents’ Talk video shows how skipping recommended vaccinations will leave children without complete protection. Prof. Sir Terence Stephenson looks at what to do if children fall behind with their vaccine schedule. By receiving vaccines on time, you can ensure maximum protection against illnesses such as measles, mumps, rubella, polio, and hepatitis. Prof. Sir Terence Stephenson is an Honorary Consultant & Nuffield Professor of Child Health at UCL GOS Institute of Child Health (UK).