The second infection that's also been on the rise is Syphilis, particularly amongst populations that are at higher risk to contract Human Immunodeficiency Virus or HIV, such as young men who have sex with men or injection drug using adolescence. (kidsinthehouse.com)
But several researchers have warned that the vaccine could trigger antibodies in a naïve subject that enhance the ability of a second infection to cause severe disease, including a deadly hemorrhagic fever. (sciencemag.org)
That genetic sequencing data revealed that specific cells substantially multiplied after the initial infection, then moved to the infection site and provided protection against the second infection. (sciencedaily.com)