+1a Infectious Mononucleosis (IM)

<p>From:&nbsp;<a href="https://me-pedia.org/wiki/Mononucleosis">Mononucleosis - MEpedia</a></p>

<p>Research studies cite figures from 12% to 24% of healthy people who contract infectious mononucleosis will have the illness progress into&nbsp;<a title="Chronic fatigue syndrome" href="https://me-pedia.org/wiki/Chronic_fatigue_syndrome">chronic fatigue syndrome</a>&nbsp;(CFS).</p>

<p><a title="Epstein-Barr virus" href="https://me-pedia.org/wiki/Epstein-Barr_virus">Epstein-Barr virus</a>&nbsp;(EBV) is the most common cause of infectious mononucleosis (IM), making up approximately 90% of those diagnosed,<sup id="cite_ref-Jason.2C_Katz.2C_2017_2-0" class="reference"><a href="https://me-pedia.org/wiki/Mononucleosis#cite_note-Jason.2C_Katz.2C_2017-2">[2]</a></sup> but other infectious agents, such as&nbsp;<a title="Cytomegalovirus" href="https://me-pedia.org/wiki/Cytomegalovirus">cytomegalovirus</a>,&nbsp;<a title="Toxoplasmosis" href="https://me-pedia.org/wiki/Toxoplasmosis">toxoplasmosis</a> gondii parasite, HIV (human immunodeficiency virus), rubella virus, hepatitis A, B, or&nbsp;<a title="Hepatitis C" href="https://me-pedia.org/wiki/Hepatitis_C">C</a> viruses, and adenovirus can cause this disease.<sup id="cite_ref-3" class="reference"><a href="https://me-pedia.org/wiki/Mononucleosis#cite_note-3">[3]</a></sup></p>

<p>Although Epstein-Barr virus is the most common cause of infectious mononucleosis, the majority of people infected with EBV never develop mononucleosis. It is estimated that 80% - 90% of the worldwide population is infected with the EBV.<sup id="cite_ref-4" class="reference"><a href="https://me-pedia.org/wiki/Mononucleosis#cite_note-4">[4]</a></sup></p>