Close MenuJ & J’s vaccination  global trial shows it to be 85% effective against developing severe Covid 19 and about 66% effective in preventing the disease altogether. This is somewhat disappointing since these results are well below the 95% effectiveness of the two vaccines already approved in the US.The vaccines already being given by Pfizer and Moderna require two shots to be fully effective but the J & J vaccine requires only one, and it does not need special refrigeration as the Pfizer and Moderna vaccines do. It can be kept for three months at 36 to 46 degree...…Close MenuJ & J’s vaccination  global trial shows it to be 85% effective against developing severe Covid 19 and about 66% effective in preventing the disease altogether. This is somewhat disappointing since these results are well below the 95% effectiveness of the two vaccines already approved in the US.The vaccines already being given by Pfizer and Moderna require two shots to be fully effective but the J & J vaccine requires only one, and it does not need special refrigeration as the Pfizer and Moderna vaccines do. It can be kept for three months at 36 to 46 degree...WW…