1. US children under 5 are getting closer to authorized Covid-19 vaccines, but most parents may be reluctant to actually get them when they become available, a new survey found.According to the Kaiser Family Foundation'sVaccine Monitor survey, published Wednesday, only 18% of parents of children under 5 said they would vaccinate their child against Covid-19 as soon as a vaccine was available.

Question: What measure was used to summarize parents' willingness to have their children vaccinated?

A. Cumulative incidence

B. Incidence rate

C. Prevalence

2. A new study in Science magazine identified antibiotics in some of the beef cattle in a USDA-approved no-antibiotics labeling program recognized as a gold standard for restaurants and grocery stores around the country.

The study tested some 699 cows at one slaughterhouse that processes "raised without antibiotics" cattle. Most cattle in the study tested negative for antibiotics. However, 10 percent of cattle came from lots where one of the cows sampled tested positive for antibiotics, the researchers found. Additionally, the study found an additional 5 percent of cattle came from lots with multiple positive antibiotic tests.

Question: What measure was used to summarize the presence of antibiotics in beef cattle.A.

A. Cumulative incidence

B. Incidence rate

C. Prevalence