dt><code>$controls</code></dt>
<dd><p>An object of class <code><a href="https://rdrr.io/pkg/spatstat.geom/man/ppp.html" class="external-link">ppp</a></code> defined over the same spatial study region with the locations
of the 1866 uninfected farms.</p></dd>


</dl></div>
    <div id="acknowledgements">
    <h2>Acknowledgements</h2>
    <p>The Animal and Plant Health Agency (APHA), UK, provided permission to use this dataset.</p>
    </div>
    <div id="references">
    <h2>References</h2>
    <p>Fernando, W