Testament and Overkill have been rocking stages hard over the past month, but being out on the road during cold and flu season is not always easy. Overkill frontman Bobby Blitz has been dealing with a cold over the course of the trek that recently turned into something more serious.

Overkill bowed out of the tour's show Friday night (Feb. 15) in Huntington, N.Y, which led the band to reveal Blitz's worsening ailment as the reason for canceling the show and potentially other dates in the immediate future.

Their statement on the matter reads as follows:

We are terribly sorry that we had to cancel our performance last night [February 15], but let's put the rumors to rest, before speculation runs rampant.

Blitz [singer Bobby Ellsworth] was diagnosed with what is called 'walking pneumonia,' and was medically advised to not perform due to it potentially getting worse if he did. When the health risk is no longer an issue, he'll be ready to kick ass once again.

Overkill's dates with Testament and support acts Flotsam and Jetsam and 4ARM are scheduled to run through the end of the month. To see the remaining stops, click here. The band has been out on the road promoting their 'The Electric Age' album.

Update: Overkill have now bowed out of the remainder of their tour with Testament. The band issued a Facebook post on the matter that reads as follows:

Due to Bobby's ongoing bout with pneumonia, we have regretfully decided to cancel the remainder of our shows on 'The Dark Roots Of Thrash' tour.

Blitz's condition has gotten slightly worse [after Saturday's show in Worcester, Massachusetts] and he needs some time to get back to 100%. We would like to thank TESTAMENT for a great tour and look forward to everyone back on the road soon. After some time for recovery, we'll be back out in the spring for our Scandinavian tour. See you then!!

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