Final answer:
The nurse should inform the parent that 'Varicella in adults can have serious consequences.' The Varivax vaccine protects against childhood chickenpox which, if contracted in adulthood, can lead to severe health complications. The vaccine also contributes to herd immunity and prevents the varicella-zoster virus from reactivating as shingles later in life.
Step-by-step explanation:
In regards to the question of why a child attending day care would need the Varivax vaccine, it is important to understand the nature of chickenpox and the implications of vaccination. While chickenpox is generally mild and self-limiting in children, it can be highly contagious and cause serious complications, such as pneumonia, Reye syndrome, or birth defects if contracted by pregnant women. Moreover, if adults contract chickenpox, it can lead to more severe health issues.
Therefore, the correct statement to tell the parent would be: "Varicella in adults can have serious consequences." Furthermore, the vaccine is not only about protecting the individual child but also about contributing to herd immunity, which protects those who cannot be vaccinated for medical reasons or who are too young to be vaccinated. Herd immunity is crucial in preventing outbreaks of diseases.
Vaccination against chickenpox also prevents the establishment of the varicella-zoster virus in the body, which can later reactivate as shingles in older age. Thus, the Varivax not only protects against chickenpox but can also reduce the risk of a person developing shingles later in life.