Analysis: US looks to Covid-19 boosters to curb virus spread

US officials preparing to roll out Covid-19 booster shots in the face of waning vaccine protection and surging hospitalisations and deaths caused by the highly contagious Delta variant are hoping they might prevent mild cases as well.

In theory, that could reduce virus transmission - a goal officials have been less explicit about - and hasten America's recovery.

“It is not the primary reason (for boosters), but it could actually be a very...