I'm dealing with HLV now and it explains why my last crop was 'meh'. Yield was shit with very little smell (terps).Just had to deal with this too with a cut a picked up a while ago.
I spent a solid month researching this pathogen and I still dont feel like I've got a grasp on it.
The only thing I've come away with is quarantine times need to be much longer and growers have to be very conscious of cross contamination.