The phrase "an extra case" is correct and usable in written English.
It can be used when referring to an additional instance or example of something, often in contexts like legal matters, packaging, or scenarios requiring additional consideration.
Example: "We need to prepare for the meeting, and I suggest we include an extra case to cover all possible outcomes."
Alternatives: "an additional case" or "a supplementary case".
Turn up at the airport with an extra case, and you get charged £40.
Over five years 312 patients would have to be treated for an extra case.
At the other end of the spectrum, only 166 patients would have to be treated with a combined prescription for five years, for there to be an extra case.
For 0≤ i≤ j≤| a| and 0≤ k≤ l≤| b|, we have (B1) and for 0≤ i< i+2≤ j≤| a| and 0≤ k< k+2≤ l≤| b|, (B2) Here, recurrence (B1) takes the form of a standard Needleman-Wunsch procedure for aligning the substring a i +1 a i +2… a j with b k +1 b k +2… b l, with an extra case to handle bifurcations in the base-pairing structure of the RNAs.
It was candles in a Corona Extra case and a store-bought card written in cursive that read, "With Sympathy".
Based on the data in the study, a total of 498 people would need to take a statin before triggering one extra case of diabetes.
Not that the additional radiation exposure won't induce a few extra cases of cancer, the experts said, but these will be indistinguishable from the background rate of cancer, which will eventually strike about 41 out of every 100 people.
Worsley packed his portion of the food, which was sealed in ten bags — one for each week of the journey, plus an extra in case of emergency.
The project was notable not just for its clever solution to the problem of carrying around an extra AirPods case, but also for the team involved.
Bring an extra in case somebody gets in a huff and wants to go off by himself or herself.
I finally decided on one of those trips to the bathroom to go ahead and pee on a stick to confirm that this was just an extra terrible case of PMS.
