· You know what M.D. means, but what does D.O. mean? What's different and what's alike between these two kinds of health care providers? · Pneumonia is an infection that inflames the air sacs in one or both lungs. The air sacs may fill with fluid or pus (purulent material), causing cough with phlegm or pus, fever, chills, and difficulty … Learn about symptoms of urinary tract infections. Find out what causes UTIs, how infections are treated and ways to prevent repeat UTIs. do和does的区别和用法区别是：do 是动词原形，用于第一人称、第三人称的复数 (I/you/we/they)。does 用于第三人称单数 (he/she/it) does 用于第三人称单数。do用于一般现在时且主语是复数we,they, The boys do do their homework after school every day. do their homework 做作业，do do their homework 确实有做作业，主语是 they ，故用 do 对do their homework中的do 进行强调：确实有做。 · Statin side effects can be uncomfortable but are rarely dangerous. · A Pap smear is a procedure that involves collecting cells from the cervix for testing. It also is called a Pap test. Healthcare professionals sometimes call it cervical cytology. A Pap test is often … · Bacteria cause bacterial infections. Viruses cause viral infections. Antibiotic medicines kill or keep many bacteria from growing but don't treat viruses. Antiviral medicines help the body clear out …
