<a href="http:&#x2F;&#x2F;journals.plos.org&#x2F;plosntds&#x2F;article?id=10.1371&#x2F;journal.pntd.0004530" rel="nofollow">http:&#x2F;&#x2F;journals.plos.org&#x2F;plosntds&#x2F;article?id=10.1371&#x2F;journal...</a><p>&quot;Historically, adult human infection with Zika virus has presented with mild, non-life threatening symptoms in 20% of infected patients, with 80% being clinically asymptomatic during initial infection.&quot;