Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Contact the care team promptly if symptoms return, worsen, or fail to improve as expected.
New fever, painful lymph-node swelling, cough, chest pain, or shortness of breath after a possible exposure requires urgent medical advice rather than waiting for a scheduled appointment.
Follow-up after plague depends on the form and severity of the infection.
A routine visit after treatment may review whether symptoms have resolved, whether blood tests or organ function need rechecking, and whether the person has medication side effects or lasting breathing problems.
Routine follow-up is appropriate for recovery checks and prevention planning.
The article also says
Take prescribed antibiotics exactly as directed and complete the course unless the treating clinician changes the plan.
Public health staff may continue to check on the patient and close contacts for a limited period.
This is a standard safety measure.
Follow instructions about symptom monitoring, temporary separation from others, and when it is safe to return to work, school, or shared living spaces.
Practical ways to reduce future exposure include:
Avoid touching sick or dead wild animals with bare hands.
Use an Environmental Protection Agency-registered insect repellent when fleas may be present.
Use permethrin-treated clothing or gear only as directed on the label; do not apply clothing treatments directly to skin.
Keep living areas and outdoor workspaces free of rodent food and shelter.
Use veterinarian-recommended flea control for pets.
Keep pets from hunting or roaming in areas with known rodent die-offs.
Report unusual groups of dead rodents to local authorities rather than handling them.
Every sign above is quoted from the sofidex article on Black death. If you are not sure, err upward — it is always reasonable to be checked.