As a growing number of Americans become eligible for a third dose of COVID-19 vaccines, CDC continues to expand its booster guidelines. The agency has amended its criteria for moderately to severely immunocompromised people to allow a fourth dose of COVID-19 vaccine six months after receiving the third dose. The criteria pertain to immunocompromised individuals…

In the early days of the pandemic, the subarctic storage requirements for mRNA COVID-19 vaccines sparked renewed interest in the cold chain. One potentially overlooked element of the cold chain is silica, according to the specialty chemicals company Evonik. The company states that its Aerosil fumed silica supports passively cold transport units using cool packs…