Reading my kids a history book on George Washington last night (published in 1996), I came across an odd couple of paragraphs that read much like the COVID jab propaganda, it was:
Washington also displayed a fatherly concern for the children's welfare. For example, he strongly supported a suggestion by Jack's tutor to vaccinate the boy against smallpox. Having suffered this terrible disease, Washington wanted Jack to escape its misery. But when the vaccine was first developed to protect against it, people were concerned about its safety.
Knowing how much Martha worried about her children, Washington instructed the tutor to arrange for Jack's vaccination along with the other students at the school. Only when Jack was safely vaccinated did George tell Martha.
This reads almost verbatim what they are trying to feed us now. This book doesn't source but how the hell would they get this level of detail unless he specifically wrote it in a journal?
There was no such thing as "vaccination" in Washington's day. Back at that time they were using "inoculations". "Vacca" in Latin is Bovine/Cow, which is what the madman Edward Jenner used (Cow pox pus) for his "small pox" inoculation starting in the mid 1800s. The British government gave this random farmer with zero medical training 150,000 POUNDS to spread his poison. That translates to like $100Million dollars in today's money.
To answer your question in the title, the answer is since day one. Dozens of doctors were calling vaccines out right from the get go demonstrating not only did they do no good in preventing any disease, but that they actually caused the very diseases they were trying to prevent, plus other diseases as well, and regularly killed people (especially kids).
I've got 3 or 4 old books in electronic format from the late 1870-1900 period loaded with scientific proofs and evidence against jabs from practicing doctors. All were of course heavily suppressed and banned.
It's also worth noting that nobody even pretended (which they do today) that they actually found these unicorn virus boogeymen. Thus, the vaccine "formulas" in those days were a toxic soup of cow pus, monkey brain, dog spinal cord, rabbit blood and tissue, etc. Pasteur and cohorts used rabbits and dogs to "ATTENUATE" (water down) the poisonous toxic batches of blended animal brain/spinal tissue by passing these toxic serum batches through live rabbit/dog bloodstreams and then collecting the final "watered-down" product which went directly into the jab serums, and ultimately into the bloodstream of humans.
Note - There's an interesting line of research that suggests it's not so much the heavy metals in jabs that are dangerous, but instead the foreign tissue/DNA which our bodies react most violently to the presence of.
Net-Net - The whole virology industry is one sick endeavor after another from beginning to end.
Witch's brew.
https://www.scientificamerican.com/article/how-elvis-got-americans-to-accept-the-polio-vaccine/
Elvis died early. He took "the vax".
The secret about vaccines is that whatever they put in the vaccine has a chance of becoming an allergen permanently to your immune system.
There has been animal tissue, egg shell, peanut, antibiotics, human stem cells, and now SWEETENER in vaccines.
https://vk.ovg.ox.ac.uk/vk/vaccine-ingredients
Their hope is that you'll be ignorant and you'll ignore any possibility that your immune system might identify these substances as foreign invaders and make you allergic to them.
"The COVID-19 vaccine will only live up to its promise if enough people actually end up getting vaccinated." What promise is that lol