Forget the Flu Vaccinations or Flu Forgetfulness?
In the midst of the winter season,
we are constantly reminded that it’s also flu season and that we need to get
the new vaccination. This year, I have felt particularly lazy, and haven’t received
my flu vaccination yet. And I don’t feel the need to. However, coming across
this article has made me change my mind, and may change your mind as well, if
you’re like me and haven’t gotten the vaccination yet.
A study investigated the effects of
three types of influenza A in mice. The three types of influenza A that were
being studied were H1N1, H7N7 and H3N2, and these strains were inserted into
the mice via the nose. Afterwards, the mice were under observation to see if
there will be any memory problems 30, 60 and 120 days after receiving the
strain. After 30 days, it was found that all of the mice have gain weight and
recovered from the flu, however the mice with H3N2 and H7N7 experienced greater
difficulty in performing a memory task. Alarmingly, the H3N2 strain is the
current strain of this year’s flu season. H7N7 is a strain that only rarely
infects people, and is considered to be very dangerous. The mice with H1N1 were
able to complete the task normally, and this strain was the cause of the swine
flu outbreak back in 2009.
In addition to the memory task,
researchers also looked into the mice’s brain tissue. They found that after 30
days, those infected with H7N7 or H3N2 had fewer dendritic spines on the
hippocampus cells, which correlates to the memory task because the hippocampus
is involved in memory. After the 120 day period, memory problems were gone.
However, 120 days for mice is roughly equivalent to 10 years for humans. Although
it’s hard to say to what extent this study can be applied to humans, it does
raise concern on the effect of the flu on human memory.
Everyone’s
aware of the typical symptoms of the flu, but this study shines a light on how
much we don’t know on the effects of the flu. This study suggests that human
memory can be impaired due to the flu. The effects are more severe than I
thought. Although getting yearly flu vaccinations may seem like a nuisance, it
is definitely worth it. So, if you haven’t gotten the flu yet, definitely remember
to get flu vaccination before it’s too late!
Article Referenced:
Article Referenced:
S. Hosseini et al. Long-term
neuroinflammation induced by influenza A virus infection and the impact on
hippocampal neuron morphology and function. Journal of Neuroscience.
Published online February 26, 2018. doi:10.1523/JNEUROSCI.1740-17.2018.
Posted by: Angelina Weng (3)
