Can a virus be seen under a microscope?

Can a virus be seen under a microscope?

Can a virus be seen under a microscope?

For a time now, as Ivan Martin tells you.

Or stationary flu, one of the most because it can attack anyone at any age. are three types (A,B and C) and several subtypes and it spreads through sneezing. Annually are an estimated 3 to 5 million cases around the world of which between 250,000 and 500,000 are fatal. Interestingly, this disease is a decisive economic factor since a pandemic can cause abstentionism and low productivity rates in addition to large public expenditures.

It is one of the most common diarrheal diseases low-income populations and each year causes around 450,000 deaths of children under 5 years of age due to lack of access to vaccines. It is transmitted through feces and due to lack of measures.

An endemic virus in Africa and Latin America transmitted by mosquito bites. There is no and it usually develops in two phases, usually people recover after 3 or 4 days those who enter the second phase can die within 10 days. Preventive vaccination is the best measure against the disease. In 2013, there an estimated 84,000-170,000 cases and 29,00060,000 deaths.

Measles is a highly contagious disease, caused by a virus that causes high fever and can blind or kill a person. In 2014, there were 114,900 deaths related to measles. It can be prevented by early vaccination and mainly affects young children.

It is contracted through contact with urine, saliva or excretions of rodents infected with it. There is no preventative treatment, it remains to wait for the early detection of the disease (which manifests itself between one and six weeks after infection).

A viral infection that can lead to diseases such as cirrhosis and liver cancer. It is estimated that 686,000 people die each year as a result of complications from this condition, contracted through contact with body fluids of infected people. It is preventable through vaccination.

the previous disease, it is an infection that attacks the liver directly. It is transmitted through the blood by mishandling of medical equipment, lack of sterilization and blood transfusions. It is estimated that there are 130 to 150 million infected people around the world, of which 700,000 die each year. Although treatments are available to control the disease, there is no effective vaccine yet.

The major source of transmission is dogs (although several species can be carriers), so it is essential to vaccinate them as as to receive the vaccine against this disease. It is recommended that any scratches or bites sustained by animals that may be carriers be reported to a doctor immediately. Every year 15 million people receive the vaccine after being bitten or scratched and 40% are under 15 years old.

Four variants of this virus are known to be transmitted through the bite of female mosquitoes

. There is no vaccine against this virus and its symptoms are usually controlled with paracetamol. Although not well reported, WHO estimates 390 million cases of infection each year.


is one of the most recent pandemics and has claimed the lives of millions of people. In 2015 alone, WHO estimates than one million deaths associated with it. It is spread through body fluids with sufficient concentration of the virus such as semen, blood, vaginal secretions and breast milk.