Question

1. which statement best describes how rates of receiving the flu vaccine changed across age groups? a. rates steadily increased. b. rates increased and then decreased. c. rates steadily decreased. d. rates decreased and then increased.

Explanation:

To answer this, we analyze typical flu vaccine rate trends by age. Usually, flu vaccine rates for children start lower, increase through middle - aged groups (due to higher risk awareness or recommendations for certain age groups like seniors and young children), and then for very old age groups, there might be a slight dip, but more commonly, the general trend across age groups (from young to old) shows an increase first (as kids and then adults in working age or seniors) and then a decrease? Wait, no, actually, the standard trend for flu vaccination by age: children (younger) have lower rates, then as age increases towards senior citizens, rates increase, but sometimes in the very oldest, there might be a small decrease. But the most common pattern that fits the options is that rates increase (e.g., from children to middle - aged to seniors) and then maybe decrease a bit, but among the options, option B (Rates increased and then decreased) is the most accurate description of the typical trend. Wait, actually, in real - world data, flu vaccination rates by age: for example, infants/toddlers have lower rates, then school - aged kids, then adults, and then seniors. But the rate often increases up to a certain age (like 65+) and then maybe plateaus or decreases slightly. So the best option among the given is B.

Answer:

B. Rates increased and then decreased.