Ways of infection
Chickenpox is transmitted exclusively by droplets. Man, the body of which caught the chicken pox is extremely contagious – 90% of contacts with patients leads to infection. For example, the infection of one child in the kindergarten group leads to the appearance of symptoms for the majority of his peers. The virus can also be spread through toys, however, the lifetime of an infection of varicella in the environment is low, and therefore the transfer of disease through common goods or in the street is unlikely.
Virus transmission occurs through breathing and coughing in close enough communication with the man. The patient with chickenpox can be contagious for 2 days before the appearance of the characteristic rash. Before the appearance of the rash the disease is not manifested.
The virus from a patient with chickenpox becomes impossible once there is a last element of the rash.
Susceptibility to the virus
Particularly susceptible children, because of the lack of the body's immunity to this virus. Most children perevalivaet chicken pox in childhood and then becomes impossible to get sick again because the body produces antibodies that hinder the development of the virus and contributing to his death. Chickenpox is rare in persons older than 15 years.
The peak incidence of chickenpox occurs in winter, most often occur epidemic of chickenpox in kindergarten and elementary school.
The disease is mild and usually does not cause any problems the child and his parents. The body itself cope with the virus, developing immunity to the disease. Recurrence of chickenpox occur in exceptional circumstances and extremely unlikely. However, children carry the virus much easier than adults, who are more susceptible to bacterial infections.
Contact rash infections can cause pus and vetranary encephalitis which can be fatal.
Many foreign experts recommend that vaccination against chickenpox in childhood. However, in Russia the vaccine against chickenpox is not used. The feasibility of injections of the disease is questioned by many experts because the body is quite successful on their own cope with virus. The vaccine is often used for pregnant women who plan to conceive or are already pregnant. If the mother had never had chicken pox, vaccination is mandatory and helps to avoid possible complications during pregnancy. For example, the fetus the mother can easily catch a disease that will have a negative impact on its development as a whole.