Why did Amazon wait until Biden’s inauguration to offer help with vaccine distribution?

Shortly after President Joe Biden was sworn into office Wednesday, Amazon congratulated him on his inauguration and offered their extensive resources to help the new administration in its vaccination effort.

"As you begin your work leading the country out of the COVID-19 crisis, Amazon stands ready to assist you in reaching your goal of vaccinating 100 million Americans in the first 100 days of your administration," Dave Clark, CEO of Amazon's worldwide consumer business, wrote in a letter to Biden Wednesday.