The phrase "a sudden deterioration" is correct and usable in written English.
It can be used to describe an unexpected and rapid decline in quality, condition, or performance of something.
Example: "The patient's health showed a sudden deterioration, prompting immediate medical intervention."
Alternatives: "a rapid decline" or "an abrupt worsening".
She also believes the radiation from the mast has led to a sudden deterioration in her health.
Sir Alan, who suffered from Parkinson's disease, died at home after a sudden deterioration in his health.
The government said the new assessment reflected the accumulated radiation that has escaped the plant, not a sudden deterioration.
All too often, older people experiencing a sudden deterioration in their health or mobility feel they have no choice but to enter residential care.
Barring a sudden deterioration in his health, the general now seems likely to remain in his Surrey mansion for months, possibly years, while his appeal drags on.
Mr Sócrates's decision represents a recognition of the inevitable, not a sudden deterioration of the euro-zone mess.In this section 70 or bust!
It was the same in Israel, where the Jerusalem Post reported a consensus among top defense chiefs that the changes at the top in the Egyptian military would not lead to any sudden deterioration on Israel's southern border.
At 10.5 months a further sudden deterioration led to central hypopnoea, limb hypotonia, encephalopathy and death 24 h later.
If you notice a severe or sudden deterioration of memory, talk to your doctor immediately.
Initial hospital administered chemotherapy treatment can cause severe toxicity, including neutropenic sepsis, and there is a real possibility that sudden deterioration and death could occur as a consequence of either disease progression or the side-effects of treatment.
Chen et al. developed a dynamical network biomarker (DNB) that can serve as a general early-warning signal to indicate an imminent bifurcation or sudden deterioration before the critical transition occurs, which means that it can identify a predisease state using time series microarray data [ 27– 29].
