Denmark said Monday it would not include the Covid-19 vaccine from US drugmaker Johnson & Johnson in its national vaccination campaign, citing worries over serious side effects involving blood clots. "The Danish Health Authority has concluded that the benefits of using the Covid-19 vaccine from Johnson & Johnson do not outweigh the risk of causing the possible adverse effect... in those who receive the vaccine," the authority said in a statement. "Therefore, the Danish Health Authority will continue the Danish mass vaccination programme against Covid-19 without the Covid-19 vaccine from Johnson & Johnson," it added. The WHO and European medicines watchdog have both authorised the vaccine. cbw/jll/po/pvh