Hi this is Tutor Nick P and this is Lesson 420.
The title of today's lesson is what's the difference between
infectious and contagious. Okay. Now of course , you know, with the corona virus
being very prevalent everywhere this has come up a lot in the class. A lot of
students have asked this because we keep seeing both words pop up and
they seem to be used almost interchangeably sometimes. So this
video is to really distinguish the difference
between them and when you might use one or maybe possibly
not use the other one. Okay. So let's take a look at the note
here. Infectious diseases are caused by an
infection, usually some germs or viruses that one
way or another get into one's body,
Any infectious disease that can spread from person to person is contagious.
Many infectious diseases are contagious. However not all of them are.
Therefore all contagious diseases are infectious, but all infectious diseases
are not necessarily contagious. Okay. So try to get that point down
right away. So If it's contagious, it will also be
infectious. No matter what. But if it's infectious it's not
necessarily contagious. Okay. Let's continue.
Okay. Good. All right. So a good example ... oh well here we could say here. An
example, for example some animal and insect bites
may be infectious but they may not be contagious.
A good example may be Lyme disease. If someone is bitten by an infected deer
tick, that person could suffer from
that disease you know, Lyme disease but another person cannot
catch the same disease by being near that person or touching things that
person touched. And of course it cannot be
airborne. You know, breathing in the same air. No. So
therefore it is an infectious disease , but it is
not contagious. All right. Let's continue. The common
cold you know, flu, SARS, the corona virus,
were all contagious. They could be spread through touch you
know, by touching things that you know, that
somebody who had the disease touched it or if they
breathed on it or sneezed on it or you know or this is airborne. Even if
you're near it and you breathe in some of the particles
of the air or sneeze that they did, you could catch it.
Of course , you know, some diseases could be possibly contagious through
forms of sex too. Kissing and so on. All right. Let's continue. The word
contagious could be sometimes used for things that
are not diseases. All right. So contagious can
also be used in this way. Okay. We say some feelings
ideas or behavior sometimes could be contagious.
All right . You know for example or some examples include
yawning. Yawning is a good one. When a lot of times you notice when
anytime somebody sees anybody yawning like ( yawning sounds) .
Something like that. It often makes people want to yawn
So we often say yawning is contagious. Sometimes laughter. It
could be , you know, if there's a lot of people laughing you ... it almost makes you
feel like laughing too. Panic could possibly be contagious too.
So there are some things that could be
contagious that is really not related to a disease. Okay. And we just have one
example here. Food poisoning , food poisoning is an
infectious disease but it is not contagious. So if somebody gets food
poisoning. Food poisoning you cannot catch it just by being near them or
breathing in the same air. Okay Anyway. I hope you got it. I hope it
was clear. I hope it was very informative. Thank you for your time. Bye-bye.