Nearly half of Americans believe Covid vaccines have probably caused a significant number of unexplained deaths, according to a Rasmussen Reports survey. Rasmussen reported that a near equal proportion worry that Covid vaccines may have major side effects (57%) as believe they are effective (56%). The mRNA vaccines ... were authorized by the Food and Drug Administration on an emergency basis after only 10 months of testing. Vaccine trials usually take about 10 years. The FDA in December 2020 decided it couldn't wait for an exhaustive study and authorized the Pfizer and Moderna vaccines after two large randomized controlled trials showed they were nearly 95% effective against symptomatic infection. But patients had been tracked for only a few months. The trials included too few participants to identify relatively rare adverse effects, especially among those of different age groups or with particular medical conditions. Public-health officials couldn't conclude with any certainty whether the vaccines cause, for example, neurological symptoms in 1 of every 100,000 recipients or cardiac problems in 1 of every 10,000 young men. While the FDA later granted both vaccines full approval, boosters were never tested in large clinical trials. Nor has the government's recommended vaccine regimen, which for seniors has been five doses in less than two years. The internet is full of stories of unexplained deaths that follow vaccines, many of which may be coincidence but some of which may not.