Is it too late to get a vaccine?

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The other day my mom's friend came here for breakfast morning. He's still works as teacher and they were having survey about taking the sinovac or the china made covid19 vaccine. We were in agreement then not to take because we thought it may not be effective. I rather continue to avoid and submit to protocol until hopefully the one from the US version ( I think ) is perfected. But situation made me think twice because something happened. Our local village chairman contracted the virus. Worst, mom was in the office with him for a pic a week ago when she receive an award for her work and it was also her advance bday party. Then that private party with the family in my eldest brother's house last thurs. That forced us to get quaranteed as well. But I wished I had taken the swab test too, because I never got that result from the last years expensive test. If her results are negative, you think I can still avail for the vaccine? With the virus getting this close, the sino vac could be the only possible left for me... Maybe we should really do the strict quarantine again...Sadly, mom is allergic to vaccines. I'm still scared of the side effects still.