00:01
So, in this question we are given a case of pertussis or whooping cough which is a disease in which there is repeated coughing and the individual can also experience pneumonia and eventually die.
00:15
So, here we are given that the for pertussis the children are given vaccination up to 5 years of age up to 5 years and a data was collected and it showed that there were 36 out of 10 ,000 children who had pertussis after vaccination which were 2 to 7 year old.
00:42
While in case of children who were 8 to 12 year old in these children 245 out of 10 ,000 individuals were affected by pertussis.
00:56
So, this basically shows that the children aged 8 to 12 year they experienced more cases of pertussis.
01:08
So, why this is so? why this is occurring? the main reason why this is occurring is because of the waning immunity by the vaccine.
01:20
Waning immunity by vaccine.
01:26
So, we are given that this vaccine for the whooping cough is given up to 5 years of age and it is working fine for 2 to 7 years.
01:38
So, up to this age this vaccine is providing enough immunity to fight this disease.
01:46
But after 8 years of age this vaccine is losing its efficacy.
01:53
So, this vaccine is losing efficacy because of which there is waning immunity or decrease in immunity against pertussis.
02:14
And that is why as the child is growing old up to 8 to 12 years of age there are more chances that he will get pertussis because the vaccine is losing its efficacy.
02:27
So, what are the measures which we can take to prevent this waning of immunity? so, firstly we have to provide booster doses of this vaccine.
02:41
Booster doses.
02:43
Booster doses are basically repeated doses of the vaccine which are given at certain intervals of time.
02:53
So repeated doses of vaccine...