Hyderabad, July 29 -- Google on Wednesday issued rules and regulations for its employees and most importantly said they need to get vaccinated if they wish to get back to office and resume work.

Spikes in infections due to a Delta variant of the virus have ramped up concerns about returning to offices, prompting Google to extend its global work-from-home option through October 18, according to chief executive Sundar Pichai.

"Anyone coming to work on our campuses will need to be vaccinated," Pichai said in a blog post.

"We're rolling this policy out in the United States in the coming weeks and will expand to other regions in the coming months."

Implementation of the policy will be adapted to local conditions, including vaccine availabi...