The Question and Answer section for A Journal of the Plague Year is a great resource to ask questions, find answers, and discuss the novel.
There was not much they could do. They were quarantined and basically died. What chapter are you referring to?
The actions of the people infected by the plague illustrate their desperation. They hid from officials, attempted to cover up their illnesses, and panicked by the isolation imposed upon them did anythng they could to escape. All of these actions...
People were forbidden to go to the burial pits because of the risk of infection.