MUMBAI: India’s coronavirus infections surpassed 600,000 on Thursday, with 17,834 deaths, as authorities battled to contain the pandemic while easing lockdown rules, officials and the health ministry said. The increase presents a severe challenge for India’s strained medical capacity and overburdened health system. An easing phase called “Unlock 2” was announced on Monday, allowing more economic activities to resume even as some densely populated containment zones stay under lockdown. (Interactive graphic tracking global spread of coronavirus: open tmsnrt.rs/3aIRuz7 in an external browser.)