Home > Newsletters > Need to Know > Set up an air filter at home Updated 18 July 2016 Action point 0 When you get back from a walk or braai, change into a clean set of clothes. Immediately toss the old ones into the laundry basket so that you don’t spread allergens throughout the house. Read more about preventing allergies. More: Need to KnowSet up an air filter at home advertisement Other news Lifestyle ‘I slept on a yoga mat for 7 days – here’s what happened to my body’ Sex These 2 factors make the biggest difference in your sexual satisfaction Diet and nutrition SEE: Cut back on salt, or else... Lifestyle Surgery for early prostate cancer might not save your life Medical Can carrots really make you see in the dark? Lifestyle Your pee can reveal your true age From our sponsors Managing diabetes in the workplace Back-to-school with diabetes Live healthier Effects on your brain? » 5 ways to get more seafood into your diet Mercury in fish may raise ALS risk Is it bad for your brain if you literally never eat fish? Calling all grown-ass picky eaters! Eeewwww! » ‘Why is my cough worse at night?’ SEE: When you cough, this is what happens to your body Can you get sick if someone coughs on you? The fine saliva mist emitted by a cough remains suspended in the air for up to 10 minutes.