Twitter closes its New York and San Francisco offices as virus resurges

Twitter is closing its New York and San Francisco offices as companies in technology and other fields backtrack on plans to reopen their headquarters amid a resurgence of COVID-19. 

The social media company had reopened its offices in both cities on July 12 and allowed workers to return on a voluntary basis. Employees reporting to the company's spaces were required to be vaccinated.  But the recent rise in the more virulent Delta variant of the coronavirus has once again made co-working a risky proposition, even for vaccinated individuals.