Swiss banking giant Credit Suisse has asked unvaccinated employees in the U.S. to continue working from home beginning Sept. 7 until at least mid-October. This decision to delay plans to bring employees back to the office is the latest from an important Wall Street player over concerns about COVID-19’s Delta variant.

“As concerns increase around the country regarding the Delta variant, we continue to strongly encourage all staff to get a COVID-19 vaccination and keep apprised of the latest uppdates to mask and physical distancing requirements in your area,” the bank said in a memo that was reported by Reuters.

Credit Suisse employees who have received the vaccine would be required to return to the office on Sept. 7. The memo detailing Credit Suisse’s decision was first reported on Wednesday by Bloomberg, which added that it was signed by managerial staff including investment bank division head Christian Meissner.

In deciding to postpone a return to the office, Credit Suisse has joined the ranks of other Wall Street banks and large corporations in pushing back these plans. It was not reported that the Swiss lender would be mandating that U.S.-based employees get vaccinated, but it is something that others in the financial world have required of their workers.

Goldman Sachs, Deloitte and Morgan Stanley are among other Wall Street giants that have instituted vaccine mandates for their employees. Other corporations as varied as Chevron and Disney have also required that employees receive the COVID-19 vaccine.

Vaccine mandates on Wall Street have created tensions within the firms, where some unvaccinated employees fear they may be ostracized by their vaccinated peers. Industry sources told The New York Post on Monday that frustration with unvaccinated employees is building at several firms, an indication of the disruption that some managers worried about ahead of any return to the office.

“If you’re someone who is not vaccinated on Wall Street, you’re considered a loser,” an anonymous Wall Street insider told The Post.