Asian pear fireblight question

I saw the following on Dave Wilson’s website:

http://www.davewilson.com/home-gardens/fruit-variety-recommendations/recommendations-usda-zones-5-9

“All those tasty Asian pears are susceptible to fireblight.”

How susceptible are hosui and shinseiki to fireblight? Anyone lost trees do to this?

I planted hosui this year but it’s to early to tell susceptibility to Fireblight. Fireblight shows up in pears when they fruit. Did a shinseiki graft on callery but have not checked it in a month or so. I graft pears by rows with certain rootstocks in each row.