Yes, there are. So as we mentioned in the call, we not only have seen excellent immunogenicity and neutralization, but we're also seeing T cell response as well in the second mice trial, which supports what the IIBR mice trial did. In addition to that, we have increased the productivity in the last quarter from somewhere around approximately 1 gram per liter to 3-plus grams per liter in 4 days. So we made tremendous progress on that, and we've generated additional strains of C1 RBD that can be used for a variety of different vaccine candidates.
And in addition, as we pointed out, we've successfully expressed one or more of the candidates for the Frederick National Laboratory, which, as you know, is part of the Vaccine Research Center and the NIH, Natural Infectious Disease Group, which of course, is related to Dr. Fauci.
So I think we made significant advances. We've got data rolling in very shortly on some of the other animal data. As we mentioned, we expect up to 10 animal studies to be conducted on the RBD, C1 RBD, either with nanoparticles, on its own, with [ ALM ] and in mice, and Ace-2 transgenic mice challenge studies and in hamster studies and of course, in challenge studies with hamsters.
So I see there's a lot going on. And of course, we're very excited about the results in terms of efficacy and obviously, the productivity for a long time, even in 1 gram per liter, a record level and now it's even higher so that we can make billions of doses even quicker and even lower cost. So hopefully, that answers your question about that.
And in addition, as we reported, we also have now produced an antibody, monoclonal antibody from C1 for SARS-CoV-2, and it's looking very promising in terms of the initial data of neutralization. And that's in conjunction with a biotech firm called IDBiologics, and they licensed that monoclonal antibody gene from the Vanderbilt University in James Crowe's lab, who was one of the most renowned respected scientists in the field. So a lot going on and a lot of other people reaching out to us even today about potentially expressing additional antibodies in C1 for SARS-CoV-2.