Read the following passage and answer the questions given below. Some words may be highlighted read carefully.

When it comes to your health, sleep plays an important role. While more sleep won’t necessarily prevent you from getting sick, skimping on it could adversely affect your immune system, leaving you susceptible to a bad cold or case of the flu. To keep yourself sniffle-free this season, here’s what you need to know. Sleep and cytokines, without sufficient sleep, your body makes fewer cytokines, a type of protein that targets infection and inflammation, effectively creating an immune response. cytokines are both produced and released during sleep, causing a double whammy if you skimp on shut-eye.  Despite numerous studies proving the negative health impacts of poor sleep, experts say many people still don’t prioritize getting enough sleep.  Chronic sleep loss even makes the flu vaccine less effective by reducing your body’s ability to respond. Stock up on naps to stay healthy, especially during the influenza season, get the recommended seven to eight hours of sleep a night. This will help keep your immune system in fighting shape which protects you from other health issues including heart disease, diabetes, and obesity.  If your sleep schedule is interrupted by a busy workweek or other factors, try to make up for the lost rest with naps. Taking two naps that are no longer than 30 minutes each —one in the morning and one in the afternoon—has been shown to help decrease stress and offset the negative effects that sleep deprivation has on the immune system.  If you can’t swing a half-hour nap during the workday, try grabbing a 20-minute siesta on your lunch hour, and another right before dinner. Other healthy tactics, of course, there’s more to boosting your immunity and guarding against illness than getting ample sleep. It’s also important to practice smart stay-healthy strategies such as washing your hands with soap regularly, avoiding close contact with people who are obviously under the weather and talking with your doctor about getting an annual flu shot.  And remember: Even if you do come down with a case of seasonal sniffles, you’ll be able to bounce back faster if your body is well-rested. S leep experts say there is ample evidence that shows that when people get the sleep they need, they will not only feel better but will also increase their odds of living healthier, more productive lives.

What is the antonym of the word Susceptible?