There's a new normal.

I have some friends, who on returning to London from a cruise, self-isolated. They believe it's the best thing to do and at the end of two weeks it will be over. Life will return to normal. The danger will have past. Maybe not.

COVID-19 is highly contagious. Why? Because it hides. Consider the Diamond Princess. Tests of most of the 3,711 people aboard the large cruise ship confirmed that 634, or 17 percent, had the virus; 328 of them did not have any symptoms at the time of diagnosis.

“Children with very mild disease are probably going to be one of the major contributors to spreading the virus across the population,” says Graham Roberts, an honorary consultant paediatrician at the University of Southamptons. -- BBC Future

COVID-19 can spread quickly and quietly. The fact that it attacks the old in a dramatic fashion and not the young means in a youthful population it may go almost unnoticed. But let the virus get into a senior's home and all hell breaks loose. Again consider the Diamond Princess. On board the cruise ship those 70 and older were most vulnerable, with an overall fatality ratio of about 7.3 percent.

COVID-19 is ripping through our world. The number of infected spikes higher daily. The death toll continues to climb. Self-isolate, practise social distancing and you, even if you are old, get through this. Soon herd immunity will bring the numbers down. But the danger will not be over despite what my friends seem to think.

Until there is a vaccine, this new coronavirus will linger. Hiding in the young and the asymtomatic. It will make those younger than fifty mostly mildly ill, if at all, but it will infect our seniors and an uncomfortably large number will die.

In the near future going out to shop or attending a family gathering will carry a ominous undertone: COVID-19. The virus may well become endemic: a part of life until a vaccine is arrives to eradicate it.