An SEIV Epidemic Model for Childhood Diseases with Partial Permanent Immunity

<div>The periodic solution of system (<a href="https://static.hindawi.com/articles/cmmm/volume-2015/420952/figures/#EEq3">3</a>).</div>

Computational and Mathematical Methods in Medicine

Figure 3: An SEIV Epidemic Model for Childhood Diseases with Partial Permanent Immunity 