BBC Compacta Class 6 Solutions - Classroom Assignment- 6

1.
Ans: 
(a) Measles, polio, mumps, chicken pox, whooping cough, diphtheria and HPV are examples of dangerous and contagious  deadly diseases i.e. diseases that spread by contact.
(b) Vaccines build up our body's natural immunity to a disease.
(c) Vaccines build antibodies in our bodies that help us in fighting the attack of some deadly diseases.
(d) According to some recent reports, more children wero boing affected by because they did not get vaccinated in time.
(e) An example of diseases wiped out by vaccination is smallpox.
(f) Vaccines are prepared from weakened or dead germs of the disease they are supposed to treat.
(g) Antibodies are special proteins that our body produces to fight bacteria and viruses.
(h) Vaccines do not work in genetic disorders  like colour blindness.
(i) Vaccines cannot protect us against diseases that are not caused by bacteria or viruses. 
(j) The existing vaccines for Covid-19 have provided less effective because the virus is mutating. 

2.
Ans: (c) 3-4-2 and 1

3.
Ans: genetic diseases are caused by genetic abnormalities or mutations within an individual's DNA rather than by bacteria or viruses, which vaccines target.  

4.
Ans: because there are more than 100 different viruses that can cause it, and a specific antibody is effective only against a specific kind of bacterium or virus. 

5.
Ans: Yes.