Psaki said the White House was leading an inter-agency process looking at these issues, and would provide guidance in line with several key principles:
"The vaccine rollout has been very impressive, and thanks to everybody who's been involved in it, but what we don't know is exactly how strong our fortifications now are, how robust our defences are against another wave,".
"I am hopeful, I don't see anything in the data right now that would cause us to deviate from the roadmap, but we have got to remain humble in the face of nature and we have to be prepared to do whatever it takes to protect the British public,"
The risk of infection fell 90% by two weeks after the second shot, the study of just under 4,000 vaccinated U.S. healthcare personnel and first responders found.
The country recorded 10,016 new infections on Monday, bringing the overall tally to 731,894, with deaths at 13,186, one of the highest caseloads in Asia.
The section 144 has been implemented for 15 days in Quetta with the aim to control the spread of deadly virus which was rapidly spread in Quetta district.
Despite reports in Chinese state media, there is still little evidence that coronavirus carried on cold-chain products can infect humans, scientists say.