The halt on Johnson & Johnson’s vaccine remains for now.

<p>This is Vaccine 411, the latest coronavirus vaccine info for April 15th, 2021.</p><p><br></p><p>The halt on Johnson &amp; Johnson’s vaccine remains for now. U.S. health advisors told the government yesterday they need more evidence to decide if a handful of unusual blood clots were linked to the shot — and if so, how big the risk is. There have been six cases out of more than 7 million inoculations in the U.S.&nbsp;</p><p><br></p><p>Denmark became the first country to stop using AstraZeneca’s vaccine altogether over similar potential links to rare blood clotting. Problem is, the new plan includes use of the Johnson &amp; Johnson vaccine, whose rollout in Europe has been delayed.</p><p><br></p><p>The answer, in case you’ve been wondering is yes, the CDC is studying those who are getting COVID-19 after being fully immunized. It’s called vaccine breakthrough. Dr. Saad Omer, a vaccine researcher at Yale, says this happens with a vaccine against any disease, it’s expected, and there’s no need to freak out.</p><p><br></p><p>People are flying again, and airlines are starting to fill those middle seats again and that may not be good. A new CDC/Kansas State study says leaving them open was working, reducing the risk of infection by 23% to 57%. Only Delta is still blocking middle seats and that will end May 1.</p><p><br></p><p>Would it comfort you to know that Professor Snape is working on potions to prevent COVID-19? Well, he is. But it’s not the one from Harry Potter’s Hogwart’s. There’s a real Professor Snape, his name is Matthew, at Oxford. He’s a professor of vaccinology and he’s trying to boost protections against the coronavirus by mixing vaccines in different ways. And yes, he’s heard every joke there is.&nbsp;</p><p><br></p><p>In the United States cases were up 8%, deaths are down 27%, and hospitalizations were up 9% over 14 days. The 7-day average of new cases has been trending up since April 5.&nbsp;</p><p><br></p><p>There are now 6,874,970 active cases in the United States. The current top 5 states by number