To eradicate measles the percentage of population to be caccinated is at least ———–%-

**Core Concept**
The concept of herd immunity is crucial in preventing the spread of infectious diseases like measles. Herd immunity is achieved when a sufficient percentage of a population is immunized, making it difficult for the disease to spread within the community.

**Why the Correct Answer is Right**
The percentage of the population required to achieve herd immunity for measles is generally considered to be around 93-95%. This is because measles is a highly contagious disease, with a basic reproduction number (R0) of approximately 12-18, meaning that a single infected individual can potentially infect 12-18 others in a fully susceptible population. To prevent outbreaks, it's essential to vaccinate enough people to reduce the number of susceptible individuals below the threshold required for sustained transmission. Achieving herd immunity helps protect vulnerable populations, such as young children and individuals with compromised immune systems, who may not be able to receive the vaccine or mount an adequate immune response.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the percentage of vaccination required to achieve herd immunity for measles is higher than 80%.

**Option B:** Option B is incorrect because the actual percentage of vaccination required for measles is not as low as 70%.

**Option D:** This option is incorrect because the percentage of vaccination required for measles is not as high as 98%.

**Clinical Pearl / High-Yield Fact**
Remember that the percentage of vaccination required to achieve herd immunity can vary depending on the specific disease, population characteristics, and other factors. It's essential to consult reputable sources, such as the World Health Organization (WHO) or the Centers for Disease Control and Prevention (CDC), for accurate information on herd immunity thresholds.

**Correct Answer: C. 95%.**