Zero dose of Polio vaccine is which is given
**Core Concept**
The zero dose of Polio vaccine is a crucial step in the immunization schedule, administered to newborns to provide immediate protection against poliovirus. This dose is essential for preventing polio, particularly in regions with high disease prevalence.
**Why the Correct Answer is Right**
The zero dose of Polio vaccine is given at birth, as part of the routine immunization schedule. This dose is crucial for providing immediate protection against poliovirus, which can cause severe and lifelong paralysis. The inactivated poliovirus vaccine (IPV) is typically used for the zero dose, as it is safer for newborns and provides long-term immunity. The correct answer is the specific type of vaccine used for the zero dose.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the type of vaccine used for the zero dose. While oral poliovirus vaccine (OPV) is also used for polio immunization, it is not typically used for the zero dose due to the risk of vaccine-associated paralytic poliomyelitis (VAPP).
* **Option B:** This option is incorrect because it is not a recognized type of vaccine used for the zero dose of polio immunization.
* **Option C:** This option is incorrect because it is not a specific type of vaccine used for the zero dose of polio immunization.
**Clinical Pearl / High-Yield Fact**
The zero dose of Polio vaccine is a critical component of the immunization schedule, and its administration at birth provides immediate protection against poliovirus.
**Correct Answer: B. Inactivated poliovirus vaccine (IPV) is given as a zero dose.**