The Effect of Vaccination on the Competitive Advantage of Two Strains of an Infectious Disease.

We investigate the impact of differential vaccine effectiveness, waning immunity, and natural cross-immunity on the capacity for vaccine-induced strain replacement in two-strain models of infectious disease spread. We focus specifically on the case where the first strain is more transmissible but the second strain is more immune-resistant. We consider two cases on vaccine-induced immunity: (1) a monovalent model where the second strain has immune escape with respect to vaccination; and (2) a bivalent model where the vaccine remains equally effective against both strains.

Australasian hidradenitis suppurativa management guidelines.

Hidradenitis Suppurativa is a burdensome inflammatory skin disease with significant quality of life impact. These management guidelines were developed to direct appropriate clinical management in the Australasian context. A systematic review was used for the basis of the consensus guidelines.

Quality-of-life evaluation in hidradenitis suppurativa in Australia: Validation and outcomes of the HiSQOL questionnaire.

Background: Hidradenitis suppurativa (HS) is a debilitating chronic inflammatory disease with significant impact upon quality of life. Generic quality-of-life measures suffer from decreased face validity and content validity, leading to the development of disease-specific quality-of-life measures such as the Hidradenitis Suppurativa Quality of Life (HiSQOL) outcome measure. The aim of this study was to validate the use of the HiSQOL in the Australian population and evaluate the quality-of-life impact in HS patients in Australia.

Urinary Protein-Biomarkers Reliably Indicate Very Early Kidney Damage in Children With Alport Syndrome Independently of Albuminuria and Inflammation.

Introduction: Alport syndrome (AS) is a hereditary type IV collagen disease. It starts shortly after birth, without clinical symptoms, and progresses to end-stage kidney disease early in life. The earlier therapy starts, the more effectively end-stage kidney disease can be delayed.

A two-strain model of infectious disease spread with asymmetric temporary immunity periods and partial cross-immunity.

We introduce a two-strain model with asymmetric temporary immunity periods and partial cross-immunity. We derive explicit conditions for competitive exclusion and coexistence of the strains depending on the strain-specific basic reproduction numbers, temporary immunity periods, and degree of cross-immunity. The results of our bifurcation analysis suggest that, even when two strains share similar basic reproduction numbers and other epidemiological parameters, a disparity in temporary immunity periods and partial or complete cross-immunity can provide a significant competitive advantage.