Photo by William Campbell/Getty Images This story is available exclusively to Insider subscribers. Become an Insider and start reading now. Specialized logistics players are carrying vaccines, and peak shipment volume is yet to come. The biggest challenge will be in rural areas, especially in countries lacking infrastructure. Temperature sensors, tracking tech, and specialized packaging are enabling the rollout. It's been three months since the first vial of Pfizer's COVID-19 vaccine boarded a United Airlines charter flight, but the logistical operation to distribute the drugs that will end the pandemic is just getting started. With more than 280 million doses already administered globally, a third vaccine just approved in the US, and trillions more to go to get to herd immunity, the pace and the opportunity in vaccine transport is as unprecedented as the rollout itself. The major distribution work can be covered by the existing players, but newcomers can make their mark in areas ripe for innovation like cold storage and technology.