to fight off	to try to get rid of
to go down with	to catch, usually non-serious illness
to get over sth	to get better/recover
to recover from	to get better, used for more serious ilnesses
to suffer from	to be ill- used for more long-term problems
to die of/from	umrzeć na
healthcare	general expression for all the services offered by hospitals, clinics, dentists, opticians, etc.
national insurance	tax paid by most adults which covers the costs of healthcare for everyone
National Health Service	British name for the service that covers hospitals, clinics, dentists etc.
family doctor/general practitioner	doctor who looks after people's general health
surgery	small centre with just two or three doctors
clinic	large centre with several doctors and kinds of services
prescription charge	charge for the medication the doctor prescribes, which you pay at a pharmacy
to go private	to choose private healthcare
diabetes	disease where the body does not properly absorb sugar and starch
bronchitis	inflammation in the breathing system, causing you to caugh
heart disease	serious illness connected with the heart which can lead to a heart attack
cancer	harmful tumour
tuberculosis	infectious disease in the lungs
cholera	an intestinal disease that can be caused by drinking bad water
hepatitis	inflammation of the liver
typhoid	fever, with red spots on the chest and abdomen
heart attack/failure	when the heart fails
to be poorly	czuć się kiepsko
to be on the mend	powracać do zdrowia
to feel a bit under the weather	być trochę chorym
to be back on one's feet again	stanąć na nogi