Operation Warp Speed highlighted the old and new science of vaccines. See the Charlotte Lozier Institute for a thorough discussion of vaccines, especially how the use of human fetal tissue from abortions has crept in. Most of the vaccines that use these cells are still using cell lines from abortions before 1985. What is a parent to do when they are asked to vaccinate their children for Rubella or Chicken Pox knowing that these vaccines are derived from use of these cell lines? Now the Johnson and Johnson vaccine for COVID19 also uses this technique. This may explain why J&J is now working with Merck to expand production, since the German based company has used this technique for other vaccines. Much thought and prayer must be used to avoid this vaccine in favor of the mRNA vaccines of Pfizer or Moderna.
Best info on mRNA vaccines is found at Dr Malone’s website, RWMaloneMD.com. The mRNA vaccines like Pfizer and Moderna actually cause our bodies to generate the “spike” protein on the surface of the COVID19 virus. Then our bodies react to this protein with antibodies. Problem is that this vaccine is too specific to one part of the virus so broad spectrum immunity is not given. So less protection to variants and waning immunity. The best vaccine would be derived from an attenuated form of COVID19 virus. This is difficult to do but would be much easier to evaluate with animal testing. The John Paul II Medical Research Institute is working on this (JP2MRI.org).