Dr Paramdeep Bilhu, London College of Optometrists said Live Science says conjunctivitis is often caused by very resistant viruses. They are not destroyed by alcohol and hydrogen peroxide-based disinfectants.
The doctor explained that conjunctivitis could be caused by an allergic reaction. But more than 75 percent of cases are caused by adenoviruses, a family of viruses that also cause cold and flu symptoms. Adenoviruses are extremely resilient; alcohol-based disinfectants (such as skin disinfectants) or hydrogen peroxide (such as Lysol) may not kill them. Additionally, a person infected with adenovirus can be contagious for two weeks after it enters the body.
Viral conjunctivitis is transmitted by airborne droplets. It can migrate across the mucous membranes connecting the respiratory system, tear ducts, and conjunctiva. The spread of the pathogen occurs through small droplets expelled by an infected person when talking, sneezing or coughing. Additionally, people with conjunctivitis almost always have a strong urge to rub their irritated eyes. The virus is transmitted from the surface of the skin to other objects and then to the hands and faces of uninfected people.
Bilhu added that the risk of conjunctivitis is highest in young children because they spend a lot of time in close contact with each other and do not follow hygiene rules.
previous fragility connected with a parasite transmitted from cats.