Rebuild the missing context
Assume the recipient will not remember every date, promise, or earlier conversation. For a message about how to support someone living with long COVID, use this factual base: acknowledge the diagnosis or treatment only as they described it and remember the practical burden around it.
Say what needs to happen next
State the decision, information, or practical action you need and include a real deadline only when one exists. Offer one specific task, flexible company, or ordinary contact that they can accept or ignore. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Avoid making urgency into pressure
Do not prescribe cures, compare outcomes, ask for optimism, or share their health information. Leave medical decisions to clinicians and contact urgent or emergency services when there is immediate danger. Do not make the other person responsible for reducing the discomfort that prompted you to write.