Toronto Raptors had largely dodged COVID-19 for the first half of an NBA season reeling from the global pandemic.But the Raptors are feeling the full force of it now, preparing to host the Detroit Pistons with a skeleton roster and coaching staff.Starters Fred VanVleet, Pascal Siakam and OG Anunoby, plus Malachi Flynn and Patrick McCaw have all been ruled out of Toronto’s rescheduled game Wednesday against visiting Detroit, along with head coach Nick Nurse and most of his coaching staff.Asked what he’s learned from the team’s first major brush with the virus, GM Bobby Webster said: “That you don’t ever want to go through it again.