Dr. Anthony Fauci noted that some local jurisdictions where infection rates are surging are already calling on individuals to wear masks in indoor public spaces regardless of vaccination status.
The Delta variant of COVID-19, or the B1.617.2 was first detected in India in October and has spread to 62 countries.
'Extended gap between two doses of Covishield reasonable approach': Fauci advises India to speed up vaccination efforts
Dr Fauci, one of COVID's most trusted names, suggests that India should step up the role of the armed forces in combating COVID-19.
Responding to a question, Dr Fauci said that India needs to immediately build makeshift field hospitals like what China did a year ago.
Dr Anthony Fauci expressed his solidarity and support with India in this hour of the current COVID-19 crisis.
'Situation very desperate': Top US COVID expert Anthony Fauci advises India to marshal all resources
The 80-year-old physician and immunologist also recommended mass vaccination to arrest the current spread of the deadly disease across India.
Meanwhile, White House coronavirus coordinator Jeff Zients said that US has longstanding commitment to India's public health.
US could soon give one million COVID-19 vaccinations a day, says Fauci as he predicts hard times ahead
The slow pace is frustrating health officials and a desperate public alike, with about a third of the first supplies shipped to states over the past few weeks used as of Tuesday morning.