Now that the excitement about discovering vaccines to combat Covid-19 has somewhat climaxed, the focus is turning to how to get these preventive shots from laboratories and into the immune systems of eagerly waiting patients without contamination along the way, or loss of potency.

Indeed, that may prove the difficult part, especially in an Asia where temperatures in some parts can rise to 50 deg C, asphalt-covered roads can sometimes be a memory, and distances from warehouses to villages vast as in countries like Indonesia or the Philippines.