Roll-out of J&J vaccine should be fast-tracked, says Prof Gray | MyJHB.co.za: Johannesburg in the news: Roll-out of J&J vaccine should be fast-tracked, says Prof Gray: Professor Glenda Gray said that the Johnson & Johnson vaccine had to be rolled out as soon as possible as there was already evidence on its ability to protect against the severe effects of the … … [Read more...] about Roll-out of J&J vaccine should be fast-tracked, says Prof Gray | MyJHB.co.za