In most cases of viral and bacterial infections, they are not deadly for most people, but for a few people they are going to be deadly. Those who get a mild case of the virus/bacteria will be spreading it, as they don't have enough symptoms to stay at home, but when someone with a compromised immune system catches the virus/bacteria, they get seriously ill, and it can kill them.Fortunately for human beings, a pathogen like 2019-nCoV cannot have its cake and eat it too. The virus cannot be both deadly and undetectable. To illustrate, we can consider the hypothetical examples of a severe and a non-severe respiratory virus.
With a more severe symptoms profile, a respiratory infection will have more sudden onset, earlier symptoms, a higher chance of severity and death, and it will probably cause patients to report to hospitals at an earlier stage of infection. An outbreak of a respiratory virus like this will typically be deadly but containable.
With a less severe symptoms profile, patients may stay in an asymptomatic or mildly symptomatic state for a long time, symptoms appearance may be more gradual than sudden, and progression to hospitalization and death would be rare. An infection like this is difficult to detect and thus difficult to control, but fortunately it is much less lethal.
What is a super spreader? An infectious disease expert explains
Bbm: ianad but suspected all along younger folks had this & continued on as normal. I think a young person is unlikely to seek medical care for a cold, an older person with medical issues probably does so often. If this is true, hard to say how many are infected.
For example, for most people a bacterial urinary infection can be painful, but with treatment it will pass. For someone with a compromised immune system, they may get an urosepsis (bacteria in the blood), get severely ill quickly, and die.
Last edited: