C.
Hope I helped xx
Note: Think about these issues. One is a disease, one is an addiction, and one is a virus. C is a virus because it can be multiplied and spread.
The options to choose from are: portal of exit, reservoir, portal of entry
The answers are JoAnn is the reservoir in the chain of transmission. The mucus from her cough is the portal of exit in the chain of transmission.
JoAnn is the reservoir because the cold is stored in her body. The mucus is the portal of exit because it is being coughed up outside the body.
<span>The blindness is considered sudden if the loss of vision develops within a few minutes to a couple of days. It may affect one or both eyes and all or part of a field of vision. </span>Sudden loss of vision can occur for a number of reasons.
The most common causes of sudden loss of vision are physical: damaged retina, Blockage of a major artery of the retina,<span>Eye injury...
</span>But, <span>tests have shown no physical basis for his symptoms. So, the diagnosis can</span> some serious medical conditions such as a stroke or brain tumour.
