Johns Hopkins University about DNA vaccines/electroporation
a small part of their study, published at March 15:
"Naked DNA vaccines can be manufactured simply and are stable at ambient temperature, but require improved delivery technologies to boost immunogenicity.
Delivery of HPV DNA via in vivo electroporation produces a stronger antibody response compared to i.m. injection or i.d. ballistic delivery via gene gun."
authors conclusion is that the best method to deliver DNA vaccines is thru electroporation.