module 5

Question 1

covid-19 is caused be a virus known as

Answer 1

SARS-CoV-2
it is a positive sense single-stranded RNA virus

Question 2

all coronaviruses

Answer 2

• are positive-sense single stranded RNA viruses
• infect mammals and birds
• cause respiratory tract infections in humans
• have characteristic club-shaped spikes on the outside

Question 3

covid-19 is transmitted by

Answer 3

airborne transmission

Question 4

how long after exposure does symptoms of covid appear

Answer 4

2-14 days after exposure

Question 5

how many people are asymptomatic

Answer 5

1 in 5 or 20%

Question 6

4 reasons for the major impact of covid-19

Answer 6

1. human-human transmition
2. high Ro
3. Asymptomatic and pre-symptomatic transmition
4. high mortality rate

Question 7

true/false covid 19 is not vector-borne transmition

Answer 7

true

Question 8

death rate of covid 19

Answer 8

1-2%

Question 9

mRNA vaccines (pfizer/bioNTech, Moderna)

Answer 9

mRNA injected directs cells to produce the spike protein which trains the bodys immune system

Question 10

vector vaccines (oxford/AstraZeneca)

Answer 10

a harmless virus containing genetic material from SARS-CoV-3 is injected

Question 11

Protein subunit vaccines

Answer 11

harmless proteins that are components of the virus are injected

Question 12

lineage is

Answer 12

a group of closely related viruses witha common ancestor

Question 13

A variant is

Answer 13

a viral genome that may contain one or more mutations that differentiate it from other variants of the SARS-CoV-2 viruses

Question 14

a variant of high consequence(VOHC)

Answer 14

is a variant for which current vaccines do not offer protection

Question 15

A variant of concern(VOC)

Answer 15

has been observed to be more infectious and is more likely to cause breakthrough infections or reinfections in those who are vaccinated or previously infected

Question 16

variant of intrest(VOI)

Answer 16

a coronavirus that compared with earlier forms of the virus has genetic characteristics that predict greater transmissiblity