strong></p>

	<p><em>&quot;Wait,&quot;</em> you might ask, <em>&quot;I thought face masks don&#39;t stop you from getting sick?&quot;</em></p>

	<p>You&#39;re right. Masks don&#39;t stop you from getting sick<sup id="fnref31"><a href="#fn31" rel="footnote">31</a></sup>... they stop you from getting <em>others</em> sick.</p>

	<p>But wait ‚Äì how can a simple piece of fabric block droplets in one direction, <em>but not the other?</em> The answer&#39;s counter-intuitive, yet simple:</p>

	<p><img src="pic