Flu Outbreak Continues In Bay Area‘This is just part of being a good citizen and not hurting your neighbor’ How do you prevent elderly people from dying from the flu? Immunize preschoolers, infectious disease experts say. A new policy mandating that preschool children receive flu vaccination went into effect in New York City earlier this month with exactly that goal in mind. Young children respond particularly well to the flu vaccine, and giving it to preschoolers creates a ripple effect that diminishes the flu in the population as a whole. Even though preschoolers are just a fraction of the population, immunizing a critical percentage of the population from the flu could significantly diminish the chance of a widespread outbreak, a phenomenon known as herd immunity. “This is just part of being a good citizen and not hurting your neighbor,” says Jon C. Tilburt, a medical professor at the Mayo Clinic. “It’s good for your neighbor’s kids and it’s good for grandma.” Jane Zucker, an assistant commissioner at New York City’s Department of Health, says herd immunity “absolutely” shaped her department’s new policy, which mirrors similar rules that have been followed in Connecticut and New Jersey followed for years. More