Many Americans didn't particularly enjoy this week as the dreaded April 15 federal tax deadline arrived. However, some health-care investors had reason to celebrate even if they had to pay up to Uncle Sam. Three stocks, in particular, enjoyed huge gains.

One benefited from cheery recommendations by not one, not two, but three different analysts. Another provided its own good news to shareholders in the form of a positive sneak peek at first-quarter results. And the third big winner joined an S&P index with the acquisition of a former member of the index.

Which health-care stocks were the most humongous of all this week? Find out by watching the following slideshow.

Keith Speights has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.