If this is a True or False question, then its false. Hope this helps! :)
I can't answer for you, this is a personal question.
So its acquired immunity and the cells responsible are the B lymphocytes that produces antibodies against the virus. Memory is keep since first encounter of the virus by the immune system by way of the antibodies that was initially produced. The antibodies are there already, which makes it fast to act upon when expose again.
Answer:
Explanation:
atio of a company's accounts receivable to its average daily sales. The collection ratio is the average number of days it takes the company to convert receivables into cash. It is also called average collection period. Dictionary of Finance and Investment Terms for: collection ratio. collection ratio.
