Which of the following explains why children must be vaccinated for communicable diseases, like measles?

they are typically exposed to less pathogens than adults.
the immunity they receive in the womb from their mother is temporary.
they lack an immune system at such a young age.
the antibiotics used to treat infections cause too many side effects in children.

Second option is correct.

Explanation:

Children must be vaccinated for communicable diseases, like measles because The immunity they receive in the womb from their mother is temporary.

Measles is caused by bacteria and it is a contagious disease.

It must be cured at a very young age . Its vaccination is firstly given at 9 months.

Hence , second option is correct.

the answer is b: 1.4 km/hr

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).