https://www.siliconvalley.com/2021/05/20/the-fall-from-grace-for-johnson-johnsons-covid-19-vaccine/

For quick, one-shot protection, Johnson & Johnson’s vaccine promised to be a key tool in the race to end the COVID-19 pandemic.

Now, more than two months after its rollout, it represents merely 5% of all inoculations in California’s ambitious vaccination campaign.