South African health inspectors have said they will not release Johnson & Johnson COVID-19 vaccines that may have been contaminated during production at a U.S. plant. The South African Health Products Regulatory Authority (SAHPRA) said it made the decision after the U.S. Food and Drug Administration (FDA) raised concerns over manufacturing practices at the Baltimore plant. "SAHPRA reviewed the data provided by the FDA and has made a decision not to release vaccine produced using the drug substance batches that were not suitable," SAHPRA said in a statement. The findings by the FDA would impact two million vaccines that are…