in briefHealth authorities worry Russia could be concealing a deadly Siberian lab leak.Experts warn weak global oversight leaves the world vulnerable to outbreaks.Health authorities are becoming increasingly concerned Russia is concealing information about a potentially serious pathogenic outbreak, following the death of a plague lab technician and the quarantining of dozens of people.The incident has caught global attention, despite the lack of clear information coming out of Russia, and highlighted serious problems with global efforts to monitor disease labs. Leading disease outbreak expert Professor Raina MacIntyre of the Kirby Institute told SBS News that the incident highlights just how exposed…