"What we have found to be the biggest challenge is not actually the supply, we have plenty of doses to share with the world, but this is a Herculean logistical challenge," Psaki said.
“In the face of this global health crisis, Pfizer’s purpose 'breakthroughs that change patients’ lives' has taken on an even greater urgency. Our hope is that our vaccine will help make this happen.”
In a study of 1,057 patients, sotrovimab resulted in a 79% reduction in risk of hospitalization for more than 24 hours or death due to any cause, the companies said on Monday.
Similar therapies developed by rivals Regeneron and Eli Lilly have been approved by US regulators for treating non-hospitalized COVID-19 patients.
On Monday, official figures showed that Indonesia had recorded a daily record high of 14,536 cases, taking the total to just over two million with nearly 55,000 deaths.
The government has said the real number of cases is likely significantly higher, and separate data published in March suggested the actual death toll is at least 60%
Bolt revealed the news on Instagram with a Father's Day family photo, showing a lightning bolt emoji next to each of his children's names in the caption, without stating when the twins were born.