Home > Newsletters > Need to Know > Set up an air filter at home Updated 12 May 2016 Action point 0 When suffering from allergies caused by pollen it is better to go outside after a good rain because rain clears pollen from the air. It’s best to stay indoors on dry, windy days. Read more about preventing allergies. More: Need to KnowSet up an air filter at home advertisement Other news Medical This man recognised and treated his own heart attack Medical 5 home remedies for fungal infections News Is this new ‘triple pill’ the answer to high blood pressure? Medical New medication approved for multidrug-resistant HIV Lifestyle How to avoid getting sick on your next flight Medical ‘Doctors thought it was menopause – but I had stage 4 brain cancer’ 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.