Simnikiwe Hlatshaneni Discovery is concerned that vaccines supplies could run out, with J&J jabs being investigated for a possible contaminant in its ingredients. An empty vile of the Pfizer vaccine during a media tour showing the Discovery vaccine process in the Discovery building in Sandton, 27 May 2021 . Picture: Neil McCartney South Africa may soon face a shortage that could slow the roll-out of Covid-19 vaccines, which currently averages 20 000 shots administered per day, says Discovery. This follows the distribution of Johnson & Johnson doses being halted in the USA and locally, this time due to the possible contamination of a key ingredient in the product. In April, South Africa temporarily suspended the rollout of the J&J COVID-19 vaccine as a precautionary measure after the United States FDA and Centres for