Q. Consider the following statements:
1.A vaccine-derived poliovirus (VDPV) is a strain of poliovirus that has been genetically engineered to be more effective.
2.India has been declared polio-free by the World Health Organization (WHO).
Which of the statement(s) given above is/are correct?
Answer: B
Notes:
Explanation –
Statement 1 is incorrect. Vaccine-derived poliovirus (VDPV) is not genetically engineered to be more effective. Instead, it is a strain that has mutated from the weakened live virus used in the oral polio vaccine (OPV). This mutation can occur in communities with low immunization coverage, leading to a form of the virus that can cause paralysis similar to the wild poliovirus.
Statement 2 is correct. India was declared polio-free by the WHO in 2014, after reporting no new cases of wild polio for three consecutive years.
Source: The Hindu
