Klompen
Active member
Virologists (Cambridge and Frankfurt Universities) have identified 3 version of SARS-2 coronavirus. Call them the first, scond, and third, the first being earliest and simplest, the others being increasingly sophisticated as they mutate to overcome human resistance. The first was first found in Canton, about 500 miles south of Canton. The specimens in Wuhan were mostly not of that type, they were type 2. [SARS-2 may have jumped to the West from Wuhan, but did not begin there.] Most of the specimens found in Europe have been type 3. The virus evolves.
A man in Hong Kong got the disease and recovered. His body produced antibodies. He got sick again months later from another version (I don't which ones.) The antibodies from one version did not help in fighting another version. Will we need three separate versions of vaccine? Will we need more if the virus evolves further?
It is so much worse than it even sounds. The "type" definitions aren't so rigid that one could even expect immunity to multiple phenotypes. The spike protein is very easily modified as needed. We may need multiple vaccine several times a year to even hope for it to actually be effective. Its not particularly realistic. Vaccine may not be a good hope for this virus. It may require entirely new approaches.