people who get an influenza vaccine produce antibodies that protect them against being infected by the particular influenza viruses that are used in the vaccine. which of the following explains why an influenza vaccine might be ineffective?

How was the climate when the ambulocetus was alive

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs