We are all pressed to get more done with limited resources. New projects are added. Deadlines and deliverables loom over us. There is only so much any of us can do alone. More specifically, we know how much time is taken up with growing cell cultures, finding high quality human tissues that are suitable for biomedical research, or making tissue or cell membrane preparations, etc. All of this must happen before an experiment can even be started.
If you have grown cells or used cells in your research, you know the problems associated growing them and in ensuring that they generate reproducible data. After obtaining or engineering a cell line, master and working banks must be produced. Supplies must be ordered. Technicians must spend hours under the hood. Sterility must be maintained. Cell cultures must be split and fed over and over again. Repeated cell counts and viability measures must be done. Cells must be harvested and aliquoted. The cultures must not contain any Mycoplasma contamination. Cell line IDs should be verified, etc.
Vaccines that protect against COVID-19 infections and illness are readily available to most of the U.S. populations. These vaccines went through an expedited, but rigorous, approval process. They appear to be highly effective and safe. The incidence of side-effects is extremely low. With this efficacy risk profile, there should be little hesitancy in being vaccinated. However, some individuals remain hesitant to receive the vaccines.