I believe that your claim is true, that there are incorrect claims about vaccination on all sides: completely effective or useless. Although I agree with the claim, when looking into your source, I found that I was unable to see the information as clicking on the link prompted me to create an account or login. It is important when claiming something to make sure there is access to the source for all those seeing it, as I cannot be sure I agree with the source, although I agree with your claim. Upon further research I found on the WHO (World Health Organization) website that vaccine efficacy is established based on a controlled clinical trial in which the actual vaccine is given to some people and a placebo is given to others. Then, based on how the patients feel they find the ‘outcome of interest’, comparing how many people felt the same outcome in the vaccine group versus the placebo group. They provide an example that a vaccine with an efficacy of 80% means that people who take the vaccine are 80% less at risk of developing illness. As you said, there are incorrect claims stated in the news, articles, and everyday conversations that vaccines are either not effective at all or are always effective. After reading the WHO article, I further believe that vaccines are effective to a certain extent as shown by their efficacy percentage.
https://www.who.int/news-room/feature-stories/detail/vaccine-efficacy-effectiveness-and-protection
