Final answer:
Staying in bed while having the flu is a public health measure to prevent the spread of the virus, fulfill social expectations, and aid one's own recovery.
Step-by-step explanation:
For Dolly, staying in bed while she has the flu is an example of a measure to prevent the spread of the illness. When one is sick with a viral infection, such as the flu, which can cause symptoms like fever, sore throat, and cough, it is socially expected that the person stays home and rests. This rest not only aids their own recovery but also protects others by minimizing the risk of the virus spreading to family, friends, or the community.
Additionally, in the context of public health and infectious diseases, such actions are considered responsible because they help to control outbreaks. Good hygienic practices, like covering your nose and mouth with a tissue when sneezing, are also crucial in stopping the transmission of the flu virus.