As Wall Street firms reopen U.S. offices while stepping up efforts to protect thousands of employees, JPMorgan ChaseSaid it may require employees to be vaccinated against COVID-19.

Jamie Dimon, its chief executive, and other members of the operations committee wrote in a memo to employees on Wednesday that the largest bank in the United States is asking employees to fill out a questionnaire about their vaccinations by the end of the month. The manager will contact employees who do not respond until they respond.

"We need you to enter this information so that we can properly prepare and manage our return to the office," the executives said in the memo. "in the future, we may force all employees to receive COVID-19 vaccination in accordance with legal requirements and medical or religious accommodation policies."

Executives say all US employees, including those who have not been vaccinated, should now plan to start working normally from July 6, although some may have to work remotely part of the time because of limited attendance.

Morgan StanleyEmployees were told this week that if they were not vaccinated, they would be banned from entering offices in the New York area.