The phrase "a kind of flu" is correct and usable in written English.
It can be used to describe a type or variation of influenza or a similar illness.
Example: "After visiting the doctor, I learned that I had a kind of flu that was circulating this season."
Alternatives: "a type of flu" or "a form of flu".
In California and nationwide, the flu strain going around is H1N1, a kind of Influenza A known as "swine flu". Nationally, 77% of flu cases so far have tested positive for H1N1, according to the U.S. Centers for Disease Control and Prevention.
Roughly 90% of people testing positive for the flu in California have had swine flu, a kind of Influenza A known as H1N1, according to state data.
But it also has a built-in flaw: The immune system has to encounter a particular kind of flu virus to develop an effective response against it.
Even before now, New York City's lab was a bit more sophisticated than the average hospital or doctor's office with a lab, when it came to identifying a specific kind of flu.
The animals that received the antibodies turned out to be protected against a different kind of flu, H2N2.
A new kind of flu vaccine that works against many different strains of influenza virus has proved to be more effective than conventional vaccines at stimulating the immune defences of laboratory ferrets, the standard animal "model" of the human infection, a study has found.
If the drugs eventually win approval from the Food and Drug Administration, they could serve as a kind of backup to the flu vaccine, which will remain the most important defense against the disease.
Maybe I'm just projecting, but it seems to me that a lot of Democrats and liberals have been suffering from a kind of low-grade political flu, an intermittent psychic headache that's equal parts helplessness, hopelessness, loneliness, and listlessness.
"I think I have some kind of flu, which makes it tough because it's just a matter of resting and keeping hydrated," she said.
This was until he got the flu, the kind of flu that makes me snort with derision when people with a cold say they've got it, the kind that saw me take him to the doctor's three times in one week because I was worried: worried about him dehydrating; worried that he had a chest infection; just really, really worried.
You've got some kind of flu.
