<unk>  viruses re-engineered to express foreign genes are vectors for production of recombinant proteins, the most common being a vaccine delivery system for antigens. Concerns about the safety of the<unk>  virus have been addressed by the development of vectors based on attenuated<unk>  viruses. One of them, the<unk>  <unk>  virus, is a highly attenuated strain of<unk>  virus that was developed towards the end of the campaign for the eradication of smallpox by Anton Mayr in Munich, Germany. Produced between 1953 and 1968 by more than 500 serial passages of<unk>  virus (from a wild strain discovered by the Turkish vaccine institute of<unk>  in chicken cells (chicken embryo fibroblast),<unk>  has lost about 10% of the<unk>  genome and with it the ability to replicate efficiently in primate cells. A recombinant<unk> -based vector for<unk> tion with different fluorescent reporter genes was developed by Antonio Siccardi, which indicate the progress of genetic recombination with the transgene of an antigen (green, colorless, red).
Modified vaccinia Ankara
Pandemrix
Oncolytic adenovirus
Civet SARS-CoV
Limestone Canyon virus
EuCorVac-19
Oncophage
EpiVacCorona