It is, however, very difficult indeed for any one of these causes to produce mental illness on its own.

Repeated attacks apparently produce more severe illness than an initial episode.

Enterotoxins can produce illness even when the microbes that produced them have been killed.

These attenuated viruses produce little or no illness in most people.

Radioactivity from an area of fallout may produce illness in the unprotected individual immediately or after a few days.

Those three act on phlegm, bile and wind to produce illness.

Before he was twenty-one years old his exertions produced severe illness.

But he also cautioned against overstating the power of mind over body in producing illness.

Researchers once thought that a prolonged lack of sleep produced mental illness.

Research has suggested that some types produce few or no symptoms, while others producing illness and intestinal inflammation.