CBSE 2026 · Region 3 · Set 3 · Q27 · 3 marks
Study the following cases : Case I: A person bitten by a rabid dog is immediately given an injection of antitoxin for rabies. Case II : A child is given rabies vaccine as a preventive measure.(a)Identify the type of immunity provided in both the cases.(b)Differentiate between the two types of immunity.(c)What is a vaccine? How does it help in preventing a disease?
Study the following cases : Case I: A person bitten by a rabid dog is immediately given an injection of antitoxin for rabies. Case II : A child is given rabies vaccine as a preventive measure.
(a)
Identify the type of immunity provided in both the cases.
(b)
Differentiate between the two types of immunity.
(c)
What is a vaccine? How does it help in preventing a disease?
Marking-scheme solution
(a)
Case I- Passive Immunity (Read made antibodies are given)
Case II- Active Immunity (vaccine stimulates body to produce its own antibodies)
(b)
| Active immunity | Passive immunity |
| Body produces antibodies. / Long term protection. | Readymade antibodies given. / Immediate short term protection. |
(c)
•
It is a preparation of weakened or inactivated pathogens or their antigens
•
It stimulates the body immune system to produce antibodies and memory cells/ preparing the body to fight with the pathogen and provide immunity thus preventing a disease.
Human Health and DiseaseImmunityUnderstandshort_answermedium
More from Human Health and Disease
- Name the category of drugs represented by the chemical structure given above. If the methyl group is…2023 · asked 3×
- Lactobacillus that sets milk into curd is categorised as:2024 · asked 3×
- Explain, giving two reasons, how immune response by "vaccine" is different from that by "antitoxin" in humans.2022 · asked 3×
- Student to attempt either option or. Describe any two situations where a medical doctor would recommend…2025 · asked 3×
- (i) Draw the structure of an antibody molecule and label any four of its parts. (ii) Differentiate between…2026 · asked 3×
- Assertion: Virus-infected cells produce interferons. Reason (R): Interferons can cause inflammation of…2024 · asked 3×
- Out of the following, select the correct match:2025 · asked 3×
- Though filariasis is not fatal, but the disease in humans is responsible for considerable suffering, gross…2022 · asked 3×
CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.