Unlike bacteria and fungi, it is not a necessary condition for life (nutrition, respiration, division) for viruses. Viruses are inactive even for years to come to the necessary conditions. But the activation and reproduction of themselves in the presence of certain conditions (penetration into the cells) are their main differences and advantages compared with bacteria and fungi.

I guess it would depend on what you mean by "control". Naturally immunity or medical intervention? And I think it's more regional and individual dependent.

I'm not a virologist, but from the point of the flu and HIV, they just mutate so much faster than bacteria. Whether natural control or interventions, if you keep having to hit a moving target, it's difficult. For people with natural immunity (ether lack of receptor, better antibody responses, etc), they are completely fine...so... in these people they won't have a problem.

That being said... I used to work on tuberculosis, and I can tell you, we don't have a handle on this either. And what protects you in one phase of the disease is what causes the pathology in the next, and it's maybe what eventually kills you. And TB can stay dormant for decades.

If we start talking about antibiotic resistance... then... we don't have a good control on this either. I think we are past the point of slowing this down.

I think in the end, it's more acute versus chronic diseases that is the split. We can control acute diseases better, because you can tell the sick people rather quickly from those who aren't infected. Chronic infection don't kill you right away, they often even won't make you overly sick. They just stick around and make you a great vehicle to spread the pathogen to other people. Then they kill you in the end...

It is due to antigenic drift and antigenic shift of the viruses characteristics. The viruses undergoes continuously changes. These are the main reason why it is difficult to control.

Many thanks for the valuable information.

Simply because viruses don't have their own synthetic machinery.

Bacteria can be killed because they are independent cells living outside of our our cells. Antibiotics can be found that are toxic to them but not to our own cells.

Viruses are obligatory parasites. They use the mechanisms of our own cells to reproduce, so if we find a chemical that stops the virus it generally also stops our own cells. Viruses function inside our own cells so any chemical that attacks them has to get inside our own cells.

Its difficult to control viruses, because they were found inside the living cells. So its treatment means killing of these cells.

Viruses consist of DNA or RNA and protein only. So they inter to living cells and reproduce by replication of DNA by the cell itself and stay in the cell and destroy the cell metabolism. So if we want to use any drug to kill veruses, we have in the end killed the cell.

Virus lives in the cells.

Кілька причин. Вони надзвичайно мінливі. Складно їх досліджувати. Фахівців мало. Необхідна складне обладнання й спеціальні приміщення.

Unfortunately, they are less effective against viruses than they are against bacteria. Antibiotic drugs kill bacteria by disrupting their cell walls. But virus' external covering, known as the viral envelope, is almost identical to the host cell's membranes, making them difficult to target.

Hello everyone. I'm not from the biotech industry, so I'm trying to understand how the viruses work. But, what if the way to find the cure to viruses in the world isn't about creating a vaccine? I'm thinking about other approaches such as using physics sciences and biological sciences together. So, the point is, There are multidisciplinary research teams devoted to finding the cure to viruses in the world?

Dear it is because the virus uses the host cells in its replication.