The national capital has gone into a six-day lockdown amid the deteriorating COVID-19 situation. Meanwhile, Union Health Minister Dr Harsh Vardhan said the next three weeks are crucial with respect to the COVID-19 pandemic situation in the country."Centre working closely with States and UTs on public health measures to contain COVID-19. Next three weeks crucial! At a meeting held today, UTs advised augmenting hospital infrastructure, ramping up testing, creating containment zones and strictly enforcing COVID appropriate behaviour," tweeted Dr Harsh Vardhan.