<p> Top US health authorities said Friday they have not yet found a "causal" link between Johnson and Johnson's Covid shot and blood clots, as the EU drug regulator probed possible instances among those who have received the vaccine.</p>.<p>"At this time, we have not found a causal relationship with vaccination and we are continuing our investigation and assessment of these cases," said a statement from the US Food and Drug Administration regulator.</p>
<p> Top US health authorities said Friday they have not yet found a "causal" link between Johnson and Johnson's Covid shot and blood clots, as the EU drug regulator probed possible instances among those who have received the vaccine.</p>.<p>"At this time, we have not found a causal relationship with vaccination and we are continuing our investigation and assessment of these cases," said a statement from the US Food and Drug Administration regulator.</p>