• How effective are the masks at filtering out tiny, harmful particles of pollution?                                    ( PM2.5 particles are  smaller than 2.5 micrometers are more harmful as they reach deep into the lungs)
  • Simple, loose fitting masks do little to combat pollution.
  • Many masks worn around Asia are simple surgical-type masks. But these are designed to prevent problems like splattering blood, not to block tiny particles.
  • It is pretty common knowledge that surgical face masks have almost no filtration efficiency against pollutants.
  • People with  heart or lung diseases, older adults, children and infants are at the highest risk of being bothered by particulate matter
  • Being exposed to any kind of particulate matter may cause increased emergency department visits and hospital stays for breathing and heart problems, worsened asthma symptoms, breathing problems, lung cancer and early deaths.
  • When particle pollution levels are high, take steps to limit the amount of air you breathe in while you're outside. For example: Think about spending more time indoors, where particle pollution levels are usually lower. Choose easier outdoor activities (like walking instead of running) so you don't breathe as hard. Avoid busy roads and highways where PM is usually worse because of emissions from cars and trucks.