Source: https://www.cdc.gov/coronavirus/2019-ncov/vaccines/facts.html
Not everyone on the Internet is your friend, honest, and knowledgeable. It usually takes time to read their posts and compare them to hard facts and data. Sad to say, there are frauds and Russian/Murdoch propagandists. But the Center for Disease Control (CDC) since July 1 1946 has been and remains a world leader in medical information along with the National Institute of Health (NIH), a primary research organization.
A retired engineer, I'm reminded of:

Your choice.
Bob Wilson
How do I know which COVID-19 vaccine information sources are accurate?
Accurate vaccine information is critical and can help stop common myths and rumors.
It can be difficult to know which sources of information you can trust. Before considering vaccine information on the Internet, check that the information comes from a credible source [not @SouthernDude rjw] and is updated on a regular basis. Learn more about finding credible vaccine information.
. . .
Bust Common Myths and Learn the Facts
. . .
Accurate vaccine information is critical and can help stop common myths and rumors.
It can be difficult to know which sources of information you can trust. Before considering vaccine information on the Internet, check that the information comes from a credible source [not @SouthernDude rjw] and is updated on a regular basis. Learn more about finding credible vaccine information.
. . .
Bust Common Myths and Learn the Facts
. . .
Not everyone on the Internet is your friend, honest, and knowledgeable. It usually takes time to read their posts and compare them to hard facts and data. Sad to say, there are frauds and Russian/Murdoch propagandists. But the Center for Disease Control (CDC) since July 1 1946 has been and remains a world leader in medical information along with the National Institute of Health (NIH), a primary research organization.
A retired engineer, I'm reminded of:

Your choice.
Bob Wilson