The proportion of Dutch people who have antibodies against the corona virus has increased from 20 to about 30 percent due to infection and vaccination,
This is evident from figures from the Sanquin blood bank, which conducts weekly research into the presence of antibodies in the blood of two thousand donors.
Sanquin's survey is not representative of the entire population, but it does provide a good indication.
The results of the latest RIVM antibody study were in line with Sanquin's conclusions.
The presence of antibodies in the blood of young people is said to increase mainly due to large outbreaks in that age group.
Vaccinations play an important role in the elderly.
Sanquin researcher Hans Zaaijer tells
that he is particularly concerned about the group of 40 to 60-year-olds.
"The middle category lags behind. Their immunity is below or just above 25 percent. And that while society is slowly opening up at a very high infection rate, and this age group can become seriously ill."
Corona patients different from the first wave: 'Younger and sicker'
More younger corona patients in hospital compared to first wave
Compared to the first wave, there are more younger corona patients in hospitals, Jan Willem Uffen, acute medicine internist at St. Antonius Hospital in Nieuwegein, told the program.
"It starts in their thirties. They are sick, quite sick. And surprisingly they are also people who have no underlying diseases at all."
The low percentage of antibodies in the 40 to 60-year-old group also worries Uffen.
The younger the patients, the higher the pressure on intensive care units (ICs).
"The older patients themselves often indicate that they no longer want to go to the ICU. That is not the case with a young patient."
The number of people with antibodies is increasing, but that does not say everything about achieving group immunity or the pressure on hospitals. Many vaccinees live in nursing homes. "With group immunity you mainly want to prevent the circulation of the virus. This group hardly contributes to that," says Zaaijer.