Effect of monovalent COVID-19 vaccines on viral interference between SARS-CoV-2 and several DNA viruses in patients with long-COVID syndrome.

"Competing interests The authors declare no financial or non-financial competing interest. M.G. has received honoraria for long-COVID lectures from the following companies: General Reinsurance AG, Genericon Pharma, and Österreichische Apotheker-Verlagsgesellschaft m.b.H."

"This study was funded by the Austrian Science Fund (KLI 1064-B) and Medical-Scientific Fund of the Mayor of Vienna City (21176) to M.G., and Austrian Science Fund (KLI 876-B) to T.A.Z. The funder played no role in study design, data collection, analysis and interpretation of data, or the writing of this manuscript."

"The POSTCOV cohort study is an ongoing multicenter prospective registry, approved by the Ethical Committee of the Medical University of Vienna and was performed in accordance with the Declaration of Helsinki (EC: 1008/2021, and EC: 1758/2022, ClinicalTrials.gov Identifier: NCT05398952). For data control, the study was extended with a case–control addition (EC: 1387/2020). The study complies with all relevant ethical regulations for clinical work with humans. Informed consent was obtained from all patients."