After the vaccine joke video daquan

According to American media reports, in the past week, at least three new york Yankees players, 65,438+0 Olympic gymnasts, several Texas lawmakers, a White House official and the staff of House Speaker Pelosi's office were tested positive for COVID-19. They all have one thing in common-they have all been vaccinated with COVID-19 vaccine.

According to experts, this phenomenon is called "breakthrough infection". Roy Gulick, director of the infectious diseases department at Weill Cornell Medical College in new york, said that even with a very effective vaccine, breakthrough infection is inevitable.

Causes of "breakthrough infection"

Jay Coles, a professor and physician at tulane university Medical College, explained that most of the breakthrough infections that have occurred so far are asymptomatic, which means that they only occur in the nasal cavity and upper respiratory tract and will not damage the lungs or other important organs inside the body. This phenomenon may be related to the vaccination mode in COVID-19.

After vaccination with COVID-19 vaccine, the human body will produce several types of "immune fighters" under its stimulation, including antibodies to prevent the virus from invading healthy cells and T cells to kill infected cells. At present, COVID-19 vaccine is usually injected through the arm, so the lymph nodes and organs near the chest will produce antibodies, but less in the nasal cavity and upper respiratory tract.

This is not pure speculation. There have been precedents to prove that the vaccination mode of vaccine will have an impact on its effect. For example, the first polio vaccine that successfully stopped the disease was also injected into muscles. But a few years later, the researchers developed an oral polio vaccine, which prevented infection more successfully by preventing polio virus from infiltrating into the intestine.