Pre-Pandemic Immunity

The Research Institute for Development in Marseille, France, published this pre-print on May 1. Pre-pandemic SARS-CoV-2 potential natural immunity among population of the Democratic Republic of Congo More than a year after the emergence of COVID-19, significant regional differences in terms of morbidity persist, showing lower incidence rates in sub-Saharan Africa, Southeast Asia, and Oceania….. … More Pre-Pandemic Immunity

That Triangle Again

As well as the often-mentioned “R Naught” number there is a “K Distribution” number used in Epidemiology which seems particularly important in transmission of SARS-CoV-2.  These mathematical terms are simplified by the below diagrams.  Where “R0” describes the average transmission distribution from infected case to susceptible contacts, “K” describes the variance, or pattern, of virus … More That Triangle Again

Pandemic Proportions

More than 200 respiratory viruses are responsible for what is colloquially called “the common cold”. All of them are seasonal to some degree. Enveloped viruses (so called because they are surrounded by an envelope of lipid) peak in winter because the cold dry air provides an optimal environment for viral transmission. Heat, humidity and possibly … More Pandemic Proportions