A recent study found that natural fever vaccines are less effective than conventional vaccines in reducing the number of people who contract the disease.
According to the researchers, in one study, vaccinated children and adults with influenza showed an average of three times the number who contracted the disease during the first month after vaccination.
But, as the number fell, so did the number with influenza in the following months.
Researchers also found that the rate of the disease increased significantly in the vaccinated group.
According the researchers from the University of Chicago, “natural fever vaccines, which are typically given for the first two months of illness, are also unlikely to be effective in reducing influenza-associated infections because the vaccine is so low in active components.”
Researchers also concluded that the vaccine “does not prevent the spread of influenza.”
A study published in the journal PLoS One in 2016 found that in an earlier study, natural fever vaccine was only slightly effective at reducing influenza infections.
Researchers found that, in contrast to the study, the researchers were unable to detect differences in the vaccine’s effectiveness when comparing vaccinated and unvaccinated children.
Researchers say that the study was conducted in a laboratory setting.
Researchers also note that in another study published last year, vaccinated and vaccinated children had similar levels of infection.
Researchers concluded that while natural fever has some potential, it’s not yet proven to be a universal vaccine.