After months of bad news, the international army of people who have been working for decades to eradicate polio will likely have something to celebrate this week. A global commission is expected to announce that type 3 polioviruses have been eradicated.

The announcement is expected on Thursday, which is World Polio Day. If it comes, type 3 polio will be the second species of polioviruses to have been vanquished. There were originally three types of polioviruses, named 1 through 3. With the eradication of type 3, only type 1 polioviruses remain.

Read more at STAT…