Big Tech starts requiring vaccines; Twitter closes re-opened U.S. offices

FILE PHOTO: A sign is pictured outside a Google office near the company's headquarters in Mountain View, California, U.S., May 8, 2019. REUTERS/Paresh Dave/File Photo

(Reuters) -Twitter Inc is shutting its reopened offices in United States, while other big tech companies are making vaccination mandatory for on-campus employees, as the highly infectious Delta COVID-19 variant drives a resurgence in cases.

Alphabet Inc's Google and Facebook Inc said on Wednesday all U.S. employees must get vaccinated to step into offices. Google is also planning to expand https://bit.ly/3zQJfNf its vaccination drive to other regions in the coming months.