Maddyone, your daughter and her husband are brave, as are all people who are asked to take risks to help the community. My daughter is on maternity leave at the moment but very soon she and her partner will be both be working again with homeless people, including addicts, ex-prisoners and people with severe mental health issues. These are people with limited opportunities to maintain hygiene and health, and often little motivation to do so. I am very anxious about the risk of them picking up the virus at work, and it must be even worse when your children are doctors.
As for the issue of the virus being like the flu, surely the point is that this virus is completely new. Seasonal flu is bad enough, that's true, but it has been around for a long time. Many people die but we do have effective anti-viral treatments for it. We also have vaccines for different strains. Scientists have some understanding of it. With COVID-19, it's a much steeper learning curve. For a start, it seemed to be a disease that attacked the lungs, till people started dying of heart attacks, strokes, kidney failure... It seems to be easier to transmit than flu and seems to have a higher mortality rate. The thing is, we are entirely defenceless against it. We are like the Native Americans, dying in their millions of diseases like measles and chickenpox, which they had never encountered before.
My other daughter, trying to explain the virus to her dad, said "Imagine that 2 animal viruses got together and had a baby virus that was a perfect machine for killing humans." She also said, before the lockdown, "The time to start panicking is when the scientists are frightened - and they're frightened now."