context arthropod-borne diseases are remaining as a major public health issue in the resource-constrained settings. mosquitoes are closely associated with mankind since time immemorial and play an important role in the transmission of many dreadful diseases like malaria, filariasis, japanese encephalitis, dengue and yellow fever. over the decades, vector control is an important element to minim...

The common reported adverse impacts of COVID-19 vaccination include the injection site’s local reaction followed by various non-specific flu-like symptoms. Nevertheless, uncommon cases of vaccine-induced immune thrombotic thrombocytopenia (VITT) and cerebral venous sinus thrombosis (CVST) following viral vector vaccines (ChAdOx1 nCoV-19 vaccine, Ad26.COV2 vaccine) have been reported. This liter...

We investigate the number of limit cycles of a planar quadratic vector field with a perturbed center-like singular point. An upper bound is obtained on the number of δ-good limit cycles of such a vector field (Theorem 1). Here δ is a parameter characterizing the limit cycles: it shows how far those cycles are from the singular points of the vector field and from the infinite points. The bound a...