Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services if you have:
Severe difficulty breathing or cannot speak in full sentences
Blue, grey, or unusually pale lips or skin
New confusion, extreme drowsiness, or difficulty waking
Fainting or collapse
Severe or persistent chest pressure
Rapid worsening with cold, clammy, or mottled skin
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek urgent medical assessment if you develop fever, cough, breathlessness, or marked weakness that could be pneumonia.
This is particularly important if you are over 50, have a weakened immune system, have a long-term lung condition, or recently stayed in a hotel, hospital, or care facility.
If you are already taking antibiotics, contact the treating service promptly if symptoms are worsening, you cannot keep fluids or medicines down, or you are not improving as expected.
And for anyone, someone who:
is getting rapidly more short of breath, or has gained several pounds in a few days with swelling
3
Does any of this apply?
Book an appointment
Routine follow-up is appropriate when you are steadily improving but still have tiredness, a mild cough, or reduced stamina.
Arrange a non-emergency review if these symptoms are not gradually easing or interfere with normal activities.
Every sign above is quoted from the sofidex article on Legionnaires disease. If you are not sure, err upward — it is always reasonable to be checked.