Flu-like symptoms develop, e.g. diarrhea, nausea, fever, confusion, dizziness, weakness, and generally feeling bad.

出现类似流感的症状，例如腹泻、恶心、发烧、头晕，虚弱，同时自我感觉很不好。

youdao

Take them at the onset of cold or flu-like symptoms.

出现感冒或类似流感症状时就服用。

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Two people are still undergoing tests in Lanarkshire after returning from Mexico with "mild" flu-like symptoms.

两人带着轻度的疑似流感症状从墨西哥返回，两人仍在拉纳克郡接受测试。

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Others may get flu-like symptoms such as fever, muscle and joint pain and headaches.

VOA: special.2010.07.12

Here in Juarez, people with flu-like symptoms have formed long lines outside of some clinics and hospitals, even though there have been no confirmed cases of swine flu here.

VOA: standard.2009.04.30

But side effects can include mild flu-like symptoms, including a runny nose or sore throat.

BBC: Flu vaccines for all children

But the MAAC player of the year has been fighting flu-like symptoms throughout the tournament.

WSJ: Iona beats Manhattan to win MAAC tournament title

Hepatitis A causes flu-like symptoms and anyone concerned should contact their GP, said Public Health Wales.

BBC: Four schoolchildren have hepatitis A in Swansea