July 28 (Reuters) - Alphabet Inc's Google said on Wednesday it would require employees in the United States to be vaccinated for stepping into its campuses, in an effort to get its workers immunized against COVID-19.

The company said it would expand the vaccination drive to other regions in the coming months. (https://bit.ly/3zQJfNf)

Many tech companies including Microsoft Corp and Uber have said they expect employees to return to office, months after pandemic-induced lockdowns forced them to shift to working remotely.

In April, Salesforce said it would allow vaccinated employees to return to some of its offices.

Google also said on Wednesday it would extend its work-from-home policy through Oct. 18 due to a recent spike in cases in different regions caused by the Delta variant.

"We'll continue watching the data carefully and let you know at least 30 days in advance before transitioning into our full return to office plans," the company added. (Reporting by Tiyashi Datta in Bengaluru; Editing by Maju Samuel)