He said that the idea is to bring down the infectivity to 2 per cent.
"The West Bengal government is trying hard. Our idea is to bring down the infectivity to 2 per cent in order to turn these red zones into green zones with two or three weeks," he said.
"We have got more than 30,000 patients in-home quarantine and 3000 to 4000 people in hospital quarantine, so these are the attempts we have been taking and West Bengal is following the guidelines of ICMR," Mukherjee added.
He said that lockdown should never be stopped abruptly it should be staggered.
"Lockdown should never be stopped abruptly it should be staggered according to the prevalence rate and measures we have been following," he said.
( With inputs from ANI )