My friends from Africa, aren't worried about flu, but this terrifies them for their family. They are all vulnerable because many people have been weakened by the diseases they get over there, TB, Hepatitis and HIV, to name a few.
Not to mention malaria, which kills millions every year, and which they can't protect themselves from, apart from with prophylactics, which are not advisable long-term. You can't stop mosquitoes from biting.
Where coronavirus is concerned, with the lack of hygiene that's prevalent there, the disease will spread like wildfire. It's what happened with AIDS in the past; when I was working on a project in Uganda in 1994, I was told that there were whole villages where there was no one alive who was older than 15.
I'm also worried about my DM, who is working in West Africa at 80 years old. I'm glad she's coming back soon.