QUESTION: Fix punctuation: This number however declines gradually during the decadelong latency period associated with AIDS Typically after CD4 cell count drops below 200 infections characteristic of AIDS set in However losing a T cell is not like losing an arm or a leg
ANS: This number however, declines gradually during the decade-long latency period associated with AIDS. Typically, after CD4 cell count drops below 200, infections characteristic of AIDS set in. However, "losing a T cell is not like losing an arm or a leg" .

QUESTION: Fix punctuation: The included fonts have 6 different aspect ratios
ANS: The included fonts have 6 different aspect ratios.

QUESTION: Fix punctuation: I had a few light days was looking for some fun so I decided to play this scammer
ANS: I had a few light days, was looking for some fun so I decided to play this scammer.

QUESTION: Fix punctuation: Environmental Project 951 Comparisons of Energy Consumption for Refrigeration in Supermarkets 4 Data handling
ANS:
Environmental Project, 951 Comparisons of Energy Consumption for Refrigeration in Supermarkets 4 Data handling