Marburg virus isn't airborne.

It's transmitted through direct contact with body fluids.

There are rumors we may hear more about the Marburg virus. Here’s a quote from a factsheet from the European ECDC.

The ECDC is the European version of the US CDC. Read about it at https://www.ecdc.europa.eu/en/about-ecdc

"Factsheet about Marburg virus disease. MVD is not an airborne disease and is considered not to be contagious before symptoms appear. Direct contact with the blood and other body fluids of infected people and animals or indirect contact with contaminated surfaces and materials like clothing, bedding and medical equipment is required for MARV transmission [1]."

Source: https://www.ecdc.europa.eu/en/infectious-disease-topics/z-disease-list/ebola-virus-disease/facts/factsheet-about-marburg-virus and a copy at https://archive.is/L2DgG

MVD is in contrast with normal flu/influenza, which is most contagious before symptoms start, which means social distancing is all but useless if you have symptoms. And masks don’t stop microscopic virus particles anyway. For more info on the mask issue, with studies, see https://wordsalad.info/tag-masksdontwork.html.