COVID-19 vaccination: why extend the interval between doses?

From the Official Journal of the Association of Medical Microbiology and Infectious Disease Canada

There is much public confusion about Covid-19 vaccination efficacy and dosing intervals. Here is some guidance you can use to explain to patients why extension of dosing intervals is needed. It concludes

We now call upon you,
trusted healthcare providers, to work with your colleagues
and patients to help explain this decision and why it will
protect us all. The conversations may not be easy, but they
are absolutely necessary.

This excerpt was printed on April 8, 2021 doi:10.3138/jammi-2021-0323