Germophobes, brace yourselves. A team of ÍÃ×ÓÏÈÉú´«Ã½ÎÄ»¯×÷Æ· engineers has revealed how tiny water droplets, invisible to the naked eye, are rapidly ejected into the air when a public restroom toilet is flushed. The research also provides a methodology to help reduce this exposure risk.