A critical review: Covid 19 vaccine efficacy and safety depends largely on accuracy of side effect reporting. With the SARS CoV2 vaccines from Pfizer, Astra Zeneca, Moderna and Johnson&Johnson the trials are currently ongoing and unfortunately we see many breakthrough cases which suggests immunity is not obtained. In such a situation the side-effects of the vaccines need to be added to the breakthrough cases rather than comparing them only to the disease SARS CoV2. In this study I suggest that the vaccine efficacy and safety is negative for the Delta variant and that therefore all vaccination globally should be stopped until the pandemic is over to try to develop a vaccine which provides immunity.