[greeneyes]

I remember we puzzled over it, but don’t think this is what we figured out.

[Melian]

The second dose of Pfizer Inc’s COVID-19 vaccine could be delayed in order to cover all priority groups as the first one is highly protective, two Canada-based researchers said in a letter published in the New England Journal of Medicine.

https://www.reuters.com/article/us-health-coronavirus-pfizer-idUSKBN2AI0EC