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our first topic this thursday on CNN 10
antibodies what they are how they work
and what they have to do with
coronavirus
I'm Carl Azuz. Thank you for watching the
american red cross is a humanitarian
group that helps people in times of
emergency or disaster
it recently told cnn that in the first
week of march
20 of the blood donations it received
from people who had not gotten a
coronavirus vaccine
showed they still had antibodies to the
disease what does that mean
the short answer is that they've
probably been infected with covet at
some point whether they had symptoms or
not
the percentage of red cross blood
donations that had antibodies present
has steadily increased since last summer
as more people have gotten and recovered
from coronavirus
an advisor to the u.s centers for
disease control says blood donors are
not a random sample of the population so
this 20 percent figure isn't a strict
scientific study
but it does reflect the diseases spread
in america
for its part the cdc estimates that by
the end of 2020
more than a quarter of the u.s
population had been infected
it's hard to know exactly because at
least 40 percent of people with covid
may have no symptoms
and may not get tested those who have
been exposed can develop natural
antibodies to protect them against the
diseasewhat's not known is how long these
antibodies work and
if they can keep people from getting
different variants or strains of coven
this is similar to what doctors say
about vaccines that people who get them
are protected against coronavirus but
how long
and whether this protects them from new
strains that's still unknown
in all cases though our antibodies may
play a role
one of the ways our immune system
protects us from viruses
is through antibodies antibodies are
proteins in our blood that attach
themselves to parts of viruses
that limits the infection and also
alerts white blood cells
to come in attack and eliminate the
virus
so in many cases if the body encounters
the same virus again
the immune system has leftover
antibodies that are taught
and remember the previous infection
these cells can either fight off the
deadly virus directly
or they can produce more antibodies to
help prevent the infection
researchers aren't entirely sure why
this process works so well for some
viruses
but not others our immune system seems
to remember some viruses
better than others a person is generally
protected for life
after one encounter with viruses like
chickenpox or polio
however there are some viruses that our
immune systems
seem to easily forget scientists have
reported that immunity could be
short-lived after encounters with some
common seasonal coronaviruses
which can cause the common cold that
could help explain why we can repeatedly
get sickwith something as simple as a cold even
if we think we've been exposed to cold
viruses before
we could be getting exposed to new
strains as well
and some viruses like the flu can mutate
oftenwhich means our old antibodies no longer
work against new strains
while most experts do believe that we're
probably going to have some protection
after being infected with the
coronavirus
we're still not sure just how long that
protection will be
or how strong
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10 second trivia the scientist dr ted
fujita became best
known for his research into what
volcanoes hurricanes tornadoes or
earthquakes
vegeta is the namesake of the enhanced
fujita scale which characterizes the
intensity of tornadoes
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parts of the american south were under
tornado watches or warnings on wednesday
roughly 50 million people were in the
path of severe storms
and the u.s storm prediction center a
government agency that's part of the
national weather service
issued its highest risk level for severe
storms and tornadoes
it hasn't done that since 2019 when the
central u.s
was hit with dozens of twisters the
worst of wednesday's storms appeared to
be headed for mississippi and alabama
last night
what that means is that strong tornadoes
that stay on the ground
potentially causing more destruction
were possible alabama's governor issued
a state of emergency on tuesday out of
an abundance of caution
cnn 10 contributor tyler malden explains
why more rough weather could be ahead
this spring
la nina can make this year's tornado
season extra feisty carl
a la nina is when the ocean temperatures
in the east central pacific are cooler
than normal
it affects the world's weather patterns
by altering the jet stream
in the united states strong temperature
differences tend to develop between hot
humid air in the south and cooler drier
air to the north
this contrast causes the jet stream to
speed up and a faster jet stream
spells more severe weather outbreaks
these ingredients are in place for this
year's tornado season
though tornadoes can form any time of
the year we see the most tornadoes
during meteorological spring
which runs from march through may and is
known as tornado season
unfortunately this year's ingredients
are comparable to the record-setting
2011 season 2011 was
the costliest tornado season ever and
deadliest in a century
it featured more than 2 000 tornadoes
900 took place during the month of april
more than 200 were spawned during the
deadly april 27th outbreak
the most tornadoes to form on a single
day and 2011
also spawned the infamous joplin
missouri tornado
that caused 3 billion dollars in damage
the most
ever by a single tornado storm anxiety
is very real understanding some key
terms and preparing in advance can help
ease those fears
understand the difference between a
watch and a warning a watch means
conditions are favorable for development
you simply need to keep an eye out for
the weather to potentially turn bad
a warning means there's an imminent
emergency and you need to seek shelter
immediatelythe weather has turned bad go ahead and
identify your safe place in case you're
placed under a warning
download your favorite weather app and
double check that your emergency
notifications are turned on
so you're alerted as soon as a warning
is issued
if you can grab something sturdy to
cover yourself while sheltered
do so it could prevent injuries if
there's flying debris
a new discovery has been made near the
northwestern shore of the dead sea
this is a large landlocked lake between
israel and jordan
and there are at least 11 caves in the
region where ancient biblical texts
called the dead sea scrolls have been
found in 1947 a shepherd boy discovered
the first of these manuscripts by
accidentthe most recent finding contains
fragments from the books of the biblical
prophets
zechariah and nahum
it's the most amazing thing i
encountered i i
found i've seen in my life
in these remote caves near the dead sea
israeli researchers found dozens of
fragments of a dead sea scroll
bearing biblical text written in greek
and dating back nearly 2 000 years
these new pieces of a biblical book have
been unearthed for the first time in
over 60 years
what we found is new parts of the puzzle
of this
rather large manuscript the manuscript
is of
a translation into greek of the
12 minor prophets from the from the
bible
archaeologists have been working in
these caves and cliffs of the judean
desert since 2017
to prevent the looting of antiquities
surveying this scale
was never conducted in the judean desert
we surveyed
more than 100 kilometers of the cliffs
of
the judean desert and you can see the
results
more historic elements were found a six
thousand year old skeleton of a child
rare coins and a complete basket thought
to be the biggest and oldest intact
basket in the world
we're looking at a basket which is about
ten thousand and five hundred years old
and it's kind of huge it's it contains
about between 90 to 100 liters
and it's all intact centuries of a hot
and dry climate means this basket made
from plant material
may yield new information on how
products were stored before pottery was
invented
from just a few millimeters to a
thumbnail in size
these fragments may look small but
experts say they could provide a huge
insight into the history before and
after the time of jesus
hadas gold cnn jerusalem
at first this almost looks like an
impressionist painting of the beach the
kind of art you'd see in a coastal
condominium
but this is a motion picture of a beach
that is frozen
the scene is a gun quit beach in
southwestern maine the man who recently
recorded it said it was
12 degrees fahrenheit outside at the
time that is not
including wind chill salt water has to
be about 28 degrees to freeze it has a
lower freezing temperature than fresh
water
so that gives you a sense of how cold it
had to get to turn
waves into icy ridges oh sure the video
makes waves and is really ice to look at
and you probably wouldn't get a sunburn
with all that ice ice baby
but no one ever says jump on in the
water's freezing and that is a deceptive
way to sell ices at the beach so
i'll hold off until the surf and the
temperature are both back up
I'm Carl Azuz. Evergreen high school gets
today's shout out
it is located on the west coast in
vancouver washington
thanks for taking 10 for CNN 10.
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