https://www.siliconvalley.com/2021/06/25/what-employers-can-ask-about-your-vaccination-status-and-what-they-cant/

More companies are bringing workers back into the office — and some employers want to know about vaccination status.

Morgan Stanley told employees who work at its Manhattan headquarters that they have to be vaccinated against Covid-19 before returning to the office. The bank also said in a memo to New York employees that staff working in buildings with a “large employee presence” must confirm their vaccination status by early July.