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 the flu / influenza | an infectious disease that causes fever, pains and weakness |
| relieve | to remove or reduce an unpleasant feeling or pain |
| symptom | a change in your body or mind that shows that you are not healthy |
| headache | a continuous pain in the head |
| phlegm | the thick yellowish-green substance that forms in the nose and throat, especially when you have a cold |
| chill | a feeling of being cold |
| nausea | the feeling that you have when you want to vomit, for example because you are ill/sick or are disgusted by something |
| vomit | to bring food from the stomach back out through the mouth |
| ache | to feel a continuous dull pain |
| joint | a place where two bones are joined together in the body in a way that enables them to bend and move |
| fatigue | a feeling of being extremely tired, usually because of hard work or exercise |
| viscous | (of a liquid) thick and sticky; not flowing freely |
| infection | an illness that is caused by bacteria or a virus and that affects one part of the body |
| bacterial infection | infection caused by bacteria |
| viral infection | infection caused by virus |
| fatal | causing or ending in death |
| antibiotic | a substance, for example penicillin, that can destroy or prevent the growth of bacteria and cure infections |
| analgesic | a substance that reduces pain |
| prescription | an official piece of paper on which a doctor writes the type of medicine you should have, and which enables you to get it from a chemist/pharmacist |
| drug | a substance used as a medicine or used in a medicine |
| dehydrate | to lose too much water from your body; to make a person's body lose too much water |