SOUTH Africa's drug regulator has said that Johnson & Johnson's COVID-19 vaccine can be given to pregnant women with co-morbidities or at high risk of contracting the coronavirus. The South African health ministry said SAHPRA had previously said pregnant and breastfeeding women should be excluded from a local research study evaluating the J&J vaccine's efficacy. That research study, which aims to immunize 500,000 health workers, resumed on Wednesday after it was temporarily suspended over extremely rare cases of blood clots in people given J&J's vaccine in the United States. But in recommendations posted on its website on Thursday, the regulator…