Many students (and non-students alike) have expressed concern about vaccine safety and wondered how a COVID-19 vaccine can be made on an accelerated timeline. They question safety and doubt effectiveness because speed is presumed to translate into sloppiness. However, vaccine research (prior to the COVID pandemic) has focused on how to make all-purpose delivery mechanisms that are then custom tailored to a particular pathogen. If you’d like to dive into the details and see how researchers have done this, years in advance of COVID, watch a lecture by NIH researchers at:

https://videocast.nih.gov/watch=36377