Coronaviruses can travel only about six feet from the infected person. It’s unknown how long they live on surfaces.
Some other viruses, like measles, can travel up to 100 feet and stay alive on surfaces for hours.
Governments will not be able to minimise both deaths from coronavirus disease 2019 (COVID-19) and the economic impact of viral spread. Keeping mortality as low as possible will be the highest priority for individuals; hence governments must put in place measures to ameliorate the inevitable economic downturn.
A simple tree diagram shows how limiting contacts early might prevent many infections.
If each infected person spreads the coronavirus to two other people, the chain of infections would grow exponentially.
Avoiding even one social transmission early on in the chain could significantly reduce the number of infections.
Source: NY Times
Still the problem is that due to their greater numbers, undocumented infections were the infection source for 79% of documented cases. These findings explain the rapid geographic spread of SARS-CoV2 and indicate containment of this virus will be particularly challenging.
Modeling results also indicate that sustained 90% travel restrictions to and from Mainland China only modestly affect the epidemic trajectory unless combined with a 50% or higher reduction of transmission in the community
Egypt, Algeria, South Africa estimated to be at highest risk in Africa, but have most prepared health systems and are least vulnerable. Nigeria, Ethiopia, Sudan, Angola, Tanzania, Ghana, and Kenya are at lower risk of importing cases, but are less prepared and more vulnerable.