Explainer: Booster shots may be way around waning jab effectiveness for some

A third jab may be of benefit to some vulnerable groups. Photo: Arthur Carron

Eilish O’Regan

The fizz of excitement that greeted the roll-out of the Covid-19 vaccine has gone flat . The dividends are being seen and people are determined to get back to the office or make up ground lost in their businesses and social lives during the pandemic.