Maybe you can answer this. If Ebola has a protein envelope that supposedly lets it penetrate certain cells easier, does that same envelope affect survival outside the host? I have read that non-enveloped viruses have better survival.
all viruses have a protein capsule or coat. This protein coat has the sites that help it recognize and bind to host cells and inject its viral DNA.
Some viruses, when they are expelled from the host cell, take with them an additional coating made of the infected cell’s membrane - a lipid coating.
These lipid coated viruses last longer outside the host, and are often harder for immune systems in the host to attack (because the cell membrane lipids act a bit like camo).
I think Ebola does not have this additional lipid coating - not sure. I never studied ebola. (Do you want to know about bacteriophage T2?)