Check out the article, he's talking about the fact that when you distribute so many vaccines, you're almost guaranteed to have a coincidence like a massive hear

Check out the article, he's talking about the fact that when you distribute so many vaccines, you're almost guaranteed to have a coincidence like a massive heart attack (to give a stark example) that appears correlated. So he's not saying you should ignore people saying there are side effects (in fact the whole point of clinical trials is to listen REALLY REALLY CLOSELY to what people say about side effects), he's saying be prepared for these correlations to be blown out of proportion.