Healthcare Delivering super-cooled COVID-19 vaccine a daunting challenge for some countries Updated : September 01, 2020 04:39 PM IST Companies developing vaccines requiring exceptional cold storage, such as Moderna and CureVac, are working hard to make their injections last longer in transit. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.