"longer illness" is correct and can be used in written English.
You can use it to describe a sickness that lasts for a long period of time, such as: "The patient's longer illness had put a strain on the family's finances."
Infections caused by resistant micro-organisms do not respond to normal treatments, resulting in longer illness and greater risk of death.
And not to prescribe in these cases is to sentence an individual to a far longer illness than he or she need suffer".
Further, they also had a lower age at interview and longer illness duration than LO BD2.
In fact, although not able to survive from the correction of multiple comparison, a tendency of negative correlation was found between the years of illness duration and the white matter connectivity initiated from cerebellum to the cortex by probabilistic fiber tracking method across all IGE patients, suggesting more impaired structural connectivity which may be related to longer illness duration.
Interestingly, longer illness duration predicted higher IL-6 levels (r = 0.30, p = 0.008).
Finally, effects were larger in studies characterized by longer illness duration.
Kids can stay on their parents' plan years longer; illnesses don't knock people into the gloomy category of those with preëxisting conditions; there are no longer lifetime limits that a baby facing a crisis can reach.
No longer will illness crush and destroy the savings that they have so carefully put away over a lifetime so that they might enjoy dignity in their later years".
Although the program never explicitly states as much, events would seem to occupy what is referred to nowadays as the "near future," when people are living longer and illness, inevitably, is on the rise.
Recovery begins to take longer, and illness more likely.
On the up side, it was around this time that the American Medical Association decided that homosexuality was no longer an illness.
