I know a few medical professionals who are really spooked by genetically engineered phages, and in fact this is an old topic of mine.
An alarming development regarding the topic of viral phages has occurred
To provide a background on this, I have a really close friend who is a doctorate of pharmacology and an expert in the related microbiology fields.
While having lengthy discussions about the future of weaponized medicine, this friend went on and on about how bacteriophages were being re engineered to attack our brain cells rather than their normal host -- bacteria, implant DNA directly into our cells to change us immediately and forever change future generations by delivering a DNA payload to the egg cells in the ovaries and also to the male reproductive system.
This would have a permanent impact on the future of mankind. Once this type of phage was received via a vaccination, those vaccinated would have the vaccine induced traits passed along via DNA insertion by the phage to all future generations.