<h2>Anyone can catch the flu<sup>1</sup></h2>

<p>Flu is caused by the influenza virus,<sup>1</sup> which changes all the time<sup>2</sup> and has many different strains.<sup>1</sup> Everyone is at risk of catching flu. It doesn’t matter how fit and healthy you are, or your age.<sup>1,2</sup></p>
