B&H Photo Video offers the Xcellon Ergonomic Vertical Mouse for $19.95. Clip the on-page coupon to drop it to $12.95. With free shipping, that's $7 off and the lowest price we could find. It's tilted sideways to match the natural angle of your hand and features web browsing and DPI adjustment buttons.
This new vaccine is the latest defense against a painful condition that is more common among older adults.