• to be off sick (BrE), to be out sick (AmE) — отсутствовать на работе из-за болезни
Our HR manager is off sick.
• to call in sick — уведомить работодателя о болезни
Mona called in sick — she caught a cold.
• to fall sick — заболеть
I’ve got a running nose — I must be falling sick.
• sick pay — оплата больничного
He works part-time and thus doesn't get sick pay.
• sick leave — больничный
After a fortnight’s sick leave she got back to work.