|Yep, that's right. All about the host order: Infection happens before damage, so...|
(Also, last time I flew through protofields, the new interface didn't show the infection, making it a much more opaque mechanic. Don't know if that's been fixed yet.)
Makes it pretty tough to use non-gravitonic cloak against the Wasps, especially given that they can instantaneously deploy a field around a planet. Tow-kill is a powerful strategy against them, but hard to do when they can see you coming and put up a small field guaranteed to break your cloak.
Two ways around that, really: (1) Plant a sweeper just outside the warp well first; or
(2) Command ships.