"during sickness" is correct and can be used in written English.
It indicates a period of time when someone is sick or ill. Here is an example sentence: "During sickness, it is important to rest and take care of yourself."
"Anorexia – not eating – is a common behaviour during sickness that is seen in people and all kinds of animals.
Sick pay recovery for small firms hiring people who claim Employment and Support Allowance, plus greater back-to-work engagement during sickness absence.
The condition of the bodies suggested that they had either suffered starvation, malnutrition or lack of medical treatment during sickness, the newspaper reported.
Dr. Hendley said it was unclear whether this was harmful, but added that during sickness it could shoot viruses or bacteria into the sinuses, and possibly cause further infection.
There was a decontamination chamber for electronics, a text-message-based communication system to help coördinate surveillance, and a foldable wooden cot with a plastic covering designed to contain bodily fluids during sickness and death.
Hermes said the "vast majority of couriers have substitutes that they use to cover rounds during sickness and holidays" and said managers recruit cover in areas where courier numbers are low.
Second, when an employee gets laid off during a sickness absence period, the transition from "sick-listed employee" to "sick-listed unemployed person" is not recorded.
In later interviews, Carey explained how during those heartfelt and emotional moments they experienced during his sickness, they were able to maintain closure for all those years of separation.
Sarah's dark-brown hair, which had fallen out during her sickness, grew back as long as ever.
And some politicians have also sought to bask in Mr. Mandela's political glow, even during his sickness.
Finding his son's mounted butterflies and a large exotic cocoon his son had talked of during his sickness, Sleptsov began to cry.
