WASHINGTON — Dr. Moncef Slaoui, who is leading the government’s COVID-19 vaccine effort, said Monday he is “as confident as we can be” that the vaccine will get into the right hands and that if there are problems in the distribution and inoculation process, adjustments can be made quickly.

“We have rehearsed, tested, did mock deliveries, every single step of the process in order to make sure we understand how it’s working,” Slaoui told “CBS This Morning.” “We also have made sure that the first 2.9 million vaccines are being distributed over three days in order to make sure that if there are any adjustments we can make, we have an opportunity to make them.”

Slaoui said he was concerned about “accidental loss of temperature control” during the distribution process but added: “The unknown and unpredictable may happen but we’re prepared to deal with that as quickly as we detect it.”

He said that by the middle of March, there will be enough vaccine to have inoculated 100 million Americans, mostly those in high-risk groups. By the end of May or the middle of June most Americans should have access to the vaccines, he said.