Khursheed Anwer
Analyst · Zacks Small Cap Research.
Yes. David, as you remember correctly, our global overall objective is to develop a vaccine against 2 antigens and an antivirus with immune modifier to improve the quality. However, for last 6, 7 months, as this SARS-CoV-2 pandemic is emerging and things have been changing, we all have learned that actually this trend, change modification, the virus is also equally important. You may have in a population a dominant strain and then an emerging stream. So, we feel that seeing the conditions the way the virus is developing, it might be more prudent at this stage to develop the technology for 2 strains, where you can quickly target the prevalent and an emerging strain that would be the need of the hour at this stage. Now, however, for multiple antigen approach that you had mentioned, we have demonstrated the construction of a multi-systronic plasmid from where we have shown the expression of spike antigen and M antigen. And plus, we also have shown from the same single plasmid that you can express IL-12, so indeed the construction of a multi-systronic vector with -- at least multiple genes, 2 genes for SARS-CoV-2 sub-unit gene trial 12, 4 genes were successfully. So, we do have that eventual goal, if you demonstrate the activity against 2 strains of SARS-CoV-2 that feed up the hour. We can certainly build on it. 2 antigens, it's the same thing. 2 genes are there so you could have 2 different antigens. And also, certain viruses are difficult to handle. RSV, HIV, there's no vaccine effective at this stage. We believe that if you could co-express an immune modifier with the same plasmid, which we have shown IL-12 can be, that could really address some of those challenges in difficult to handle pathogens. So, it's an incremental approach. To a sense right now that's more what's needed, and down the road, we've built our technology with going into 2 antigens and immune modifiers, so.