Viruses like SARS-CoV-2 use sugar molecules to hide from the immune system, but scientists at Scripps Research have designed a universal coronavirus vaccine that strips these sugars and exposes a stable, rarely mutating part of the spike protein. This approach triggered strong immune responses in
dextrotomorphan, is the cough medicine, i find it has little effect on coughs. i believes its the 1st generations(diphenhydramine, doxylamine,bropheneramine,etc) anti-histamine that is preventing the smptoms, because also prevents mucus production via anti-cholingernic effects and the cough, besides the fever.
and pehnyleprine has no effect on you what so ever, you need the pseudoephedrine, but its regulated in the usa, and only available at the pharmacy counter, because Pseudoephedrine is used to make METH. dextromorphan is also recently been regulated, requiring ID, because stupid young children teens, are robotripping on it apparently.