Updated on March 16, 2024
| spanish | The Spanish flu killed millions in the early twentieth century. | 
| avian | Avian flu is a highly contagious viral disease that can affect poultry and other birds. | 
| asian | The Asian flu pandemic of 1957-1958 was caused by an influenza A virus of the H2N2 subtype. | 
| stomach | |
| intestinal | I've been suffering from the intestinal flu for the past few days and it's been awful. | 
| bad | I've been home with a bad flu all week. | 
| gastric | The gastric flu can cause severe stomach cramps, nausea, and vomiting. | 
| blue | I'm sorry, I'm not sure what you mean by "blue flu". | 
| pandemic | The pandemic flu is an event that has occurred throughout history. | 
| severe | I was out sick with a severe flu last week. | 
| mild | She was only suffering from a mild flu | 
| swine | Swine flu is a respiratory disease caused by the type A H1N1 influenza virus. | 
| common | |
| terrible | I'm suffering from a terrible flu and I can't go to work. | 
| hour | I had the hour flu | 
| asiatic | |
| cold | My brother has been suffering from a bad cold flu for the past few days. | 
| nasty | I've been feeling under the weather with this nasty flu | 
| called | |
| seasonal | The seasonal flu can cause fever, chills, and muscle aches. | 
| russian | The Russian flu was a particularly severe strain of influenza that caused a pandemic in 1889–1890. | 
| deadly | The deadly flu has spread throughout the region, causing widespread illness and death. | 
| virulent | The virulent flu incapacitated the entire town, causing widespread illness and misery. | 
| ordinary | The ordinary flu is not as deadly as the Spanish flu was. | 
| worst | My sister had the worst flu last year. | 
| epidemic | The epidemic flu has spread throughout the city and is affecting thousands of people. | 
| bird | |
| annual | Get your annual flu shot today to protect yourself from the virus. | 
| damn | The damn flu is making me miserable. | 
| awful | I'm suffering from an awful flu that's left me feeling weak and miserable. | 
| day | The day flu left me feeling weak and achy. | 
| gastrointestinal | I was out sick with the gastrointestinal flu last week. | 
| horrible | I woke up with a horrible flu and had to stay home from work. | 
| anti | |
| yuppie | It wasn't the flu he had, it was just a case of yuppie flu | 
| dreadful | She had been ill with a dreadful flu for a week. | 
| slight | I'm feeling a bit under the weather with a slight flu | 
| violent | The violent flu kept me bedridden for a week. | 
| equine | The horse was quarantined due to equine flu | 
| incipient | I am feeling the incipient flu coming on. | 
| wretched | I've got the wretched flu and I feel terrible. | 
| persistent | The persistent flu has been going around for weeks now. | 
| blown | The flu has made me feel blown flu | 
| debilitating | The debilitating flu kept him home from work for several days. | 
| bronchial | Bronchial flu is a type of influenza that affects the bronchi, which are the large airways in the lungs. | 
| intentional | My classmate gave me the intentional flu | 
| contagious | The contagious flu had spread to most students at school. | 
| futuristic | I can't believe I got the futuristic flu it's 2077, and we should have cured this by now! | 
| grade | I'm feeling under the weather with the grade flu | 
| maternal | She was diagnosed with maternal flu after giving birth. | 
| mysterious | He was lying in bed with a mysterious flu that made his body ache. | 
| recurrent | She is going to the doctor because she has a recurrent flu | 
| goddamn | I'm stuck in bed with this goddamn flu | 
| hog | The hog flu was a deadly pandemic that spread around the world in 2009. | 
| feline | The cat developed a bad case of feline flu | 
| infectious | The infectious flu spread rapidly through the school. | 
| devastating | The devastating flu has caused widespread panic and illness throughout the city. | 
| egyptian | That cold turned out to be the egyptian flu | 
| feverish | I tossed and turned in my bed with a feverish flu | 
| dearest | Dearest flu I hope you're feeling better soon. | 
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