Amazon .com Inc. is offering to help the Biden administration accelerate the distribution of COVID-19 vaccines, including to its own employees.

Amazon .com Inc. will slowly increase the assortment of products that can be shipped to its warehouses this week, easing restrictions instituted in March that prioritized essential goods such as medical supplies, groceries and pet food amid the pandemic.

Amazon .com Inc. is severing ties with small delivery firms around the country — putting at least 1,300 drivers out of work — in an effort to eliminate partners that aren’t meeting its standards.