It would seem to be at least more than a day, but my impression reading the article, it seems probably more than 3 days because it states his "condition continued to decline", but piecing it together from the article, impossible to tell.
"...He received two shots..."
"As Miguel’s condition continued to decline, Hunter, still living in Coquille, went with another family member to visit her father in Portland. By Nov. 25, he was no longer contagious, meaning she could go in the room with him."
"...Soon after they’d left the hospital, Hunter got a call from the nurses. They said she should come back quickly."
"...When they arrived, she found her father in his worst state yet. Miguel De La Torre died soon after, in the early hours of Nov. 26,..."
Late next week, his doctors probably will know which it was.