J&J Shot Study Shows Covid Infections Halved in Health Workers

Johnson & Johnson’s Covid-19 vaccine cuts the risk of getting infected with the disease by about half, according to the latest results of a trial involving almost half a million health workers in South Africa.

The vast majority of the breakthrough infections were mild, <-bsp-person state="{"_id":"0000017b-c0f2-d34b-a5fb-effb070f0000","_type":"00000160-6f41-dae1-adf0-6ff519590003"}">Glenda Gray, co-leader of the study known as Sisonke, said in an interview, citing unpublished data from the trial, which had earlier shown the shot’s effectiveness against severe illness.

Like all Covid vaccines, J&J’s was intended and tested for its ability to prevent Covid hospitalizations and deaths. Even so, the frequency of breakthrough infections ...