|Michael Novakhov – SharedNewsLinks|
|‘Emerging evidence’ of airborne transmission of coronavirus, says WHO|
(CNN)The World Health Organization confirmed there is “emerging evidence” of airborne transmission of the coronavirus following the publication of a letter Monday signed by 239 scientists that urged the agency to be more forthcoming about the likelihood that people can catch the virus from droplets floating in the air.
Dr. Benedetta Alleganzi, WHO Technical Lead for Infection Prevention and Control, said during a briefing Tuesday, that the agency has discussed and collaborated with many of the scientists who signed the letter.
“We acknowledge that there is emerging evidence in this field, as in all other fields regarding the Covid-19 virus and
and therefore we believe that we have to be open to this evidence and understand its implications regarding the modes of transmission and also regarding the precautions that need to be taken,” Alleganzi said.
Infectious disease epidemiologist Maria Van Kerkove, with WHO’s Health Emergencies Program, said many of the letter’s signatories are engineers, “which adds to growing knowledge about the importance of ventilation, which we feel is very important.”
She said the agency is working on a scientific brief summarizing the current knowledge around transmission of the deadly virus, which should be available in the coming weeks.
Alleganzi emphasized more research is still needed on Covid-19 transmission.
“So, these are fields of research that are really growing and for which there is some evidence emerging but is not definitive,” she said.
“And therefore, the possibility of airborne transmission in public settings, especially in very specific conditions crowded, closed, poorly ventilated settings that have been described cannot be ruled out. However, the evidence needs to be gathered and interpreted.”
|From environmental variability to disease prevention largely based on data from China|
Hantaviruses can cause hantavirus pulmonary syndrome (HPS) in the Americas and hemorrhagic fever with renal syndrome (HFRS) in Eurasia. In recent decades, repeated outbreaks of hantavirus disease have led to public concern and have created a global public health burden. Hantavirus spillover from natural hosts into human populations could be considered an ecological process, in which environmental forces, behavioral determinants of exposure, and dynamics at the humananimal interface affect human susceptibility and the epidemiology of the disease. In this review, we summarize the progress made in understanding hantavirus epidemiology and rodent reservoir population biology. We mainly focus on three species of rodent hosts with longitudinal studies of sufficient scale: the striped field mouse (Apodemus agrarius, the main reservoir host for Hantaan virus [HTNV], which causes HFRS) in Asia, the deer mouse (Peromyscus maniculatus, the main reservoir host for Sin Nombre virus [SNV], which causes HPS) in North America, and the bank vole (Myodes glareolus, the main reservoir host for Puumala virus [PUUV], which causes HFRS) in Europe. Moreover, we discuss the influence of ecological factors on human hantavirus disease outbreaks and provide an overview of research perspectives.
Citation: Tian H, Stenseth NC (2019) The ecological dynamics of hantavirus diseases: From environmental variability to disease prevention largely based on data from China. PLoS Negl Trop Dis 13(2): e0006901. <a href=”https://doi.org/10.1371/journal.pntd.0006901″ rel=”nofollow”>https://doi.org/10.1371/journal.pntd.0006901</a>
Editor: Patricia V. Aguilar, University of Texas Medical Branch, UNITED STATES
Published: February 21, 2019