while ill; during illness
Used to describe a state or action occurring during a period of illness. Often appears in formal or written contexts.
Adequate rest is necessary while you are ill.
病中にもかかわらず、彼は仕事を続けた。
Despite being ill, he continued working.
Compound of 病 (illness) and 中 (during). The reading びょうちゅう follows standard on'yomi.