Backflow: reverse flow condition created by a difference in water pressures, which causes water to flow back into the distribution pipes of a potable water supply from any source or sources other than an intended source. pływ wsteczny

Background level: normal or typical level of a substance in the environment, often referring to the naturally occurring level. poziom tła

Backup provider: designated substitute for a primary care provider who will supply treatment in the event the primary care provider is not available; performs the same function as the primary care provider. dostawca zapasowy/pomocniczy

Bacteraemia: presence of bacteria in the blood; cf. sepsis. bakteriemia, sepsa

Bacteria: (sg. bacterium) simplest and smallest forms of life. bakterie

Bacterial agent: live pathogenic organism that can cause disease, illness, or death. czynnik bakteryjny

Bad debts: income lost to a provider because of failure of patients to pay amounts owed. złe długi

Baffle: flat board or plate, deflector, guide or similar device constructed or placed in flowing water or slurry systems to cause more uniform flow velocities, to absorb energy, and to divert, guide, or agitate liquids (water, chemical solutions, slurry). przegroda, deflektor

Balance billing: practice of physicians to charge a patient the balance of charges when the patient's insurance (or other third party payer) will not pay the entire charge. obciążanie pacjenta różnicą kosztów

Balance sheet: statement showing the financial position at a particular point in time (e.g. at the end of the financial year), listing all assets and liabilities outstanding at that time; derived from the income and expenditure account, incorporating information on accruals, depreciation and stock balances.