onkeys showed immunity to the COVID-19 coronavirus for at least 28 days.<sup id="fnref42"><a href="#fn42" rel="footnote">42</a></sup></li>
	</ul>

	<p>But for COVID-19 <em>in humans</em>, as of May 1st 2020, &quot;how long&quot; is the big unknown.</p>

	<p>For these simulations, let&#39;s say it&#39;s 1 year.
	<strong>Here&#39;s a simulation starting with 100% <span class="nowrap"><icon r></icon></strong>,</span> exponentially decaying into susceptible, no-immunity <span class="nowrap"><icon s></icon>s</sp