It was high time to admit the side effects at least two years ago. From Tom Ozimek at The Epoch Times via zerohedge.com:
Dr. Robert Redfield, former director of the Centers for Disease Control and Prevention (CDC), said Thursday that many officials who tried to warn the public about potential problems with COVID-19 vaccines were pressured into silence and that it’s high time to admit that there were “significant” side effects that made people sick.

Dr. Redfield made the remarks in a May 16 interview with Chris Cuomo on NewsNation, during which he lamented the loss of public confidence in public health agencies because of a lack of transparency around the vaccines, which he said “saved a lot of lives” but also made some people “quite ill.”
“Those of us that tried to suggest there may be significant side effects from vaccines … we kind of got canceled because no one wanted to talk about the potential that there was a problem from the vaccines, because they were afraid that that would cause people not to want to get vaccinated,” Dr. Redfield said.
In his role as head of the CDC, Dr. Redfield was part of the Trump administration’s Operation Warp Speed, a project to surge COVID-19 vaccine development at a time during the pandemic when little was known about the virus and rapid vaccine rollout was widely seen as key to getting the outbreak under control and lockdowns lifted.