SAN DIEGO, Calif. — With COVID’s Delta variant becoming the new concern during the pandemic, many areas are continuing to insist that the public use face masks. However, just how many masks will do? According to a recent study, three-layered masks are more effective at preventing the spread of COVID viral particles. Previous studies have shown masks with three layers are more successful at blocking the passage of small respiratory particles however, recent research indicates they are also better at preventing large particles from breaking down into smaller droplets. This makes them the better option for protection. In a study...