The severity, frequency, and duration of symptoms vary depending on the individual and his or her particular illness.

症状的严重性、频繁度和持续时长会因患者和他们特定的疾病而 异。

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ARV treatment varies according to the patient but essentially entails the mixing of an assortment of drugs, catered to the severity and nature of the patient's illness.

抗逆转录病毒(ARV)疗法视病人情况不同而有所区别，但实质则是使用几种药物的混合物，以适应病人疾病的严重程度和生理机能。

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When illness does occur, about 80-90% of episodes are of mild or moderate severity and are difficult to distinguish clinically from other types of acute diarrhoea.

当实际发病时，约80 - 90%的发作为轻度或中度，并且在临床上与其它类型的急性腹泻很难区别。

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Patients with shingles may be prescribed an antiviral medication and possibly steroids to help shorten the duration of the illness and lessen the severity of the symptoms.

CNN: Is it possible to get shingles after childbirth a second time?

Participants completed a daily diary for the duration of their illness and rated the the severity of their symptoms including cough, shortness of breath, chest pain, and blocked or runny nose.

BBC: Antibiotics 'ineffective for coughs'

The reason on an absolute dollar basis that Medicare admin cost may be higher is because they use more services (medical services due to age and case mix severity of illness) and since a per cent of every dollar spend goes to admin service the absolute cost is higher.

FORBES: The Myth of Medicare's 'Low Administrative Costs'