22. I have heard that some children get diseases that they have supposedly been immunised against. How can this be true?

• Unfortunately, no medical intervention works perfectly.
• Nevertheless, the vaccines we provide are extremely effective when the child receives all of the doses needed.
• But since vaccines are not 100% effective, a small number of vaccinated children will still get the disease. Their bodies do not respond enough to the vaccine.·      
• The vaccine still helps them. They will get less sick than if they had not been vaccinated, because their bodies are at least partially prepared for the disease.

• Infection usually does cause better immunity than vaccination. However, the price paid for natural disease can include:
• paralysis
• permanent brain damage
• liver cirrhosis/cancer
• deafness
• blindness
• pneumonia
• death