Asian pear fireblight question

I saw the following on Dave Wilson’s website:

“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.