Coronavirus spike protein, for example, SARS-CoV-2 spike (S) protein, expressed by an avian paramyxovirus type 3 (APMV3) as a vaccine vector for prevention and treatment against infection, such as SARS-CoV-2.

This invention relates to adjuvant formulations comprising various combinations of triterpenoids, sterols, immunomodulators, polymers, and Th2 stimulators; methods for making the adjuvant compositions; and the use of the adjuvant formulations in immunogenic and vaccine compositions with different antigens. This invention further relates to the use of the formulations in the treatment of animals.

The present invention relates to genetically modified ascomycetous filamentous fungi, particularly of the species Thermothelomyces heterothallica, capable of producing multiple immune-active molecules, in particular viral antigens, with antigens from various coronavirus variants being a specific example.

The invention discloses an avian infectious bronchitis virus purification method. The method uses ordinary avian embryo which was affected by avian bronchitis virus. Using the combination of centrifugation, ultrafiltration, concentration, molecular sieve chromatography and ultrafiltration method can effectively remove miscellaneous protein in embryo-derived infectious bronchitis virus antigen, high virus recovery, and have no effect on the activity of avian infectious bronchitis virus. The avian infectious bronchitis virus purified by this method can be directly used in the preparation of avian infectious bronchitis virus vaccine.

This invention relates to adjuvant formulations comprising various combinations of triterpenoids, sterols, immunomodulators, polymers, and Th2 stimulators; methods for making the adjuvant compositions; and the use of the adjuvant formulations in immunogenic and vaccine compositions with different antigens. This invention further relates to the use of the formulations in the treatment of animals.

The present disclosure includes, among other things, RNA polynucleotide compositions that (A) include modified nucleosides; and/or (B) have been purified using a chromatography system and/or an affinity-based separation system. Methods of production and treatment related to the same are also provided.

The present disclosure provides compositions, methods and kits for internal controls of microvesicle isolations. The compositions, methods and kits can comprise enveloped viruses, including, but not limited to, inactive mouse hepatitis virus (MHV).

Disclosed is a betacoronavirus fusion recombinant protein, comprising an RBD region and a COVID19-SF5 fragment of a spike protein of SARS-COV-2 (COVID-19), and an amino acid sequence of the COVID19-SF5 fragment is an 880th amino acid to a 1084th amino acid of the S protein of the novel coronavirus COVID-19. According to the invention, a constant conserved fragment (COVID19-SF5) and a receptor binding domain (RBD) fragment are fused and expressed to provide a more-effective constant universal vaccine candidate recombinant fusion protein for such type of coronavirus, thus providing broader and better protection measures from two standpoints of inhibiting receptor recognition and providing universal protection.

Disclosed herein are nucleic acid constructs for producing a virus-like particle (VLP) capable of raising an immune response against severe acute respiratory syndrome coronavirus (SARS-CoV), and uses thereof, wherein the constructs comprise nucleic acid sequences encoding an immunogen and a polyprotein, wherein the polyprotein comprises two or more viral structural proteins, wherein at least two of the two or more viral structural proteins are separated by a signal peptidase sequence such that, when the polyprotein is expressed in a host cell, the signal peptidase sequence undergoes host cell peptidase-dependent cleavage to liberate the two or more viral structural proteins, thereby allowing the liberated structural proteins to self-assemble into a VLP carrying the immunogen.

The invention relates to a biologically produced nucleic acid sequence comprising two or three primary nucleic acid sequence parts of SARS-COV-2 and not more than three secondary nucleic acid sequence parts, wherein a secondary nucleic acid sequence part encodes an amino acid sequence having the function of a SARS-COV-2 amino acid sequence encoded by ORF3a, ORF6, ORF7a or ORF8. The invention further relates to a host cell or a kit for producing the nucleic acid of the invention, a vector encoding the nucleic acid of the invention and products that can be obtained by the expression of the nucleic acid of the invention such as virus envelopes. The invention further relates a pharmaceutical composition comprising the nucleic acid of the invention or products derived thereof, preferably for use in the prevention of SARS-COV-2.