Tajikistan soon will have eight 258-liter Ultra Cold Chain freezers to store the Pfizer vaccines. This is the first time Tajikistan will be using that technology.
The donation comes on top of 3 million doses of Moderna vaccine delivered in July. Worldwide, the United States has delivered more than 140 million COVID-19 vaccines.
The US embassy donated the equipment on behalf of the US Department of Defence and US Central Command.
The donation comes after Tajikistan received 1.5 million doses of US vaccines earlier this week as new variants of the virus are spreading.
As the United States donates 2 million vaccine doses to Tajikistan and Georgia, Beijing continues to resist WHO probe into COVID-19 origins.
Infection rates are spiking in countries that relied on Chinese-made COVID-19 vaccines, while leaders in Beijing continue to tout their country's 'greatness' in defeating the virus.
It represents the largest single purchase and donation of COVID-19 vaccines by any single country ever. Pfizer jabs will start being sent out to the world's poorest countries in August.
Mounting evidence points to the Wuhan Institute of Virology as the origin of the devastating global pandemic, and China's propaganda machine is working overtime to debunk the theory.
The United States has donated nearly $600,000 worth of supplies to Tajikistan since the pandemic began.
With a selection of vaccines now offering recipients a wider choice, Kazakhs are avoiding Hayat-Vax, a version of China's Sinopharm, medics say.