From Google Scholar & other sources: Selected Journal Articles, Newsletters, Dissertations, Theses, Commentary

Identification of vaccine-derived polioviruses using dual-stage real-time RT-PCR
DR Kilpatrick, K Ching, J Iber, Q Chen, SJ Yang, L De… – Journal of Virological …, 2013
Abstract Vaccine-derived polioviruses (VDPVs) are associated with polio outbreaks and prolonged infections in individuals with primary immunodeficiencies. VDPV-specific PCR assays for each of the three Sabin oral poliovirus vaccine (OPV) strains were developed, …

Effectiveness of Influenza Vaccination in Institutionalized Older Adults: A Systematic Review
TC Chan, I Fan-Ngai Hung, J Ka-Hay Luk, LW Chu… – Journal of the American …, 2013
… adults. Criticism regarding the effectiveness of influenza vaccine estimated by nonrandomized observational studies include the frailty selection bias and use of nonspecific outcome, such as all-cause mortality. Methods. We …