You can follow Dr Eric Topol or Dr Florian Krammer on twitter as they for sure will be able to explain the data in layman terms. Great people to follow. There are others as well.

Yet by publicly speculating about unethical behavior that you have no basis for, you give wrong and potentially harmful ideas to people who are not experts. If you want to get an expert opinion, you should ask "Why did the effectiveness rise from 90% to 95%?".

For much the same reasons as you don't want people adding additional baseless speculation to passing observations of you that you may be a pedophile in passing conversation.

If that was indeed your intent, it definitely didn't sound like that in your post, which came across as unwarranted conspiracy theory BS.

You could have gotten your point across better without insinuating negative intent, i.e. "As someone unfamiliar with the reporting process, can someone more familiar with the process explain how Pfizer's effectiveness number went from 90% just recently to 95% today? Thanks in advance."

If you're looking to be educated, instead of drawing unfounded conclusions, you might instead ask a question, like "I'm confused what these numbers represent. Could someone more versed in clinical trials explain them?"

This comes across much differently than "this seems like these numbers -- which I confess I do not understand -- seem manufactured by the drug companies to look good."

You're thinking of hypothesis. https://www.merriam-webster.com/dictionary/hypothesis#note-1 Hypo- meaning "lower" or "lesser".