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  1. www.webmd.com › covid › coronavirus-face-masksFace Mask for Coronavirus: Types, Best Filters, How to Make ...

    2024年5月16日 · What Are Face Masks? Face masks prevent disease droplets you cough, sneeze, or breathe from infecting others. They also help keep people who have COVID-19 or other illnesses from infecting you. As...

  2. www.webmd.com › covid › coronavirus-transmission-overviewHow Coronavirus Is Transmitted: Here Are All the Ways It Can ...

    2023年12月19日 · 11 min read. COVID-19 Transmission. By understanding how coronavirus spreads, you can take the right steps so you don't get sick and infect others. COVID transmission rate. Recent data from the...

  3. www.webmd.com › sleep-disorders › sleep-101Stages of Sleep: REM and Non-REM Sleep Cycles - WebMD

    2022年11月16日 · What Is REM Sleep? Usually, REM sleep happens 90 minutes after you fall asleep. The first period of REM typically lasts 10 minutes. Each of your later REM stages gets longer, and the final one...

  4. www.webmd.com › sleep-disorders › sleep-apneaSleep Apnea: Types, Causes, Risk Factors, Effects on Health ...

    2024年3月14日 · Sleep apnea is a serious sleep disorder that happens when your breathing stops and starts while you're asleep. If it goes untreated, it can cause loud snoring, daytime tiredness, or more serious...

  5. www.webmd.com › genital-herpes › herpes-tests-what-you-should-knowHSV Tests for Genital Herpes: Test Types (PCR vs. Culture vs ...

    2022年8月30日 · Viral Culture. Polymerase Chain Reaction (PCR) Test. Blood Test. 3 min read. Genital herpes is a common sexually transmitted disease. It’s caused by two different viruses called herpes simplex type...

  6. www.webmd.com › pain-management › what-is-extracorporealWhat Is Extracorporeal Shockwave Therapy? - WebMD

    Treatment typically lasts between 5 and 15 minutes. While this treatment can be uncomfortable for some, most do not experience any pain. Once treatment is completed, patients should do their best...