The way he spoke sounds like if I don’t get vaccinated, I could be a threat to the world. The vaccinations can't be 100% effective if you still have a chance to get infected even if you have been vaccinated. He said he was vaccinated for the people around him, especially for the vulnerable and the elderly. It sounds a little fake to me. Although I don’t want to get vaccinated, I still do my duty to be a good citizen. I wear a face mask when I go outside and I use alcohol to clean my hands when I walk in any shops or other places. How about others? I am sure that there are some people in this world who think that because they have been vaccinated, they are perfectly safe. They don’t wear a mask, use alcohol or hand sanitizer to wash their hands. People are inherently selfish and live by double standards. They always think that their opinions are right. The more I get to know this world, the more disappointed I am about it. Does it sound natural?