If a person is severely ill it is seen as they are impure or "poisoned" this does not mean that they will not be cared for but generally it is taboo to enter a temple or shrine if you are injured or sick since you are bringing impurity into their sacred place. Severe illness will be typically treated by a local physician and Buddhist priest who will cleanse the sufferer of the impure spiritual affliction
iatrogenic illness
Common reaction to severe short term stress reaction
No
acute reaction
A severe allergic reaction could result in anaphylactic shock and death.
A Peanut Allergy is always severe, even if you have not had a serious reaction in the past. Many people take risks b/c they have not had a severe reaction in the past. Unfortunately, some of these people do die when they do have a severe reaction.
Gautama Buddha is believed to have died at the age of 80 after ingesting a meal containing a type of mushroom that caused him severe illness. This incident is recorded in the Buddhist text called the Mahaparinibbana Sutta.
He had severe asthma as a child
disabled senior has severe mold in 4 rooms causing and contributing to severe illness. Needs financial assistance to remove mold and repair home.
If referring to an illness, it is after the incubation period, the stage of the illness where the symptoms are the most severe, before recovery or convalesense.
SARS - Severe Acute Respritory Syndrome
The illness can be more severe so they have to take more of the drug dosage