The present disclosure relates to an isolated or purified antibody, or a fragment thereof, having a binding domain that binds to a coronavirus (e.g., SARS-COV-2) or a portion thereof. In other embodiments, the antibody includes a binding domain that competes with binding to angiotensin converting enzyme 2 (ACE2) or a portion thereof. Methods of using such antibodies are also described herein, such as methods of treating or delaying the progression of a disease associated with a coronavirus.

Compositions and methods of using these compositions that can include a targeting moiety and a therapeutic agent are described herein. These compositions can be used for diagnosing and/or treating flaviviridaefamily viruses including Zika virus, dengue virus, and yellow fever.

This disclosure provides novel neutralizing anti-SARS-COV-2 antibodies or antigen-binding fragments thereof. The disclosed anti-SARS-COV-2 antibodies constitute a novel therapeutic strategy in protection from SARS-COV-2 infections.

Single-domain monoclonal antibodies that specifically bind Lassa virus glycoprotein (GPC) are described. The single-domain antibodies (nanobodies) were isolated from camel (V.sub.HH) and shark variable new antigen (V.sub.NAR) phage display libraries panned against a stabilized form of the GPC trimer. The GPC-specific nanobodies, and conjugates thereof, can be used for the diagnosis and treatment of a Lassa virus infection.

The invention provides novel cytotoxic compounds and cytotoxic conjugates comprising these cytotoxic compounds and cell-binding agents. More specifically, this invention relates to novel thailanstatin A analogs, useful as cytotoxic small molecule toxins in antibody-drug conjugates (ADCs). The present invention further relates to compositions including these cytotoxic compounds and ADCs, and methods for using these toxins and ADCs to treat pathological conditions including cancer.

The present invention relates to therapeutic conjugates with improved ability to target various diseased cells containing a targeting moiety (such as an antibody or antibody fragment), a linker and a therapeutic moiety, and further relates to processes for making and using the conjugates.

The invention provides novel cytotoxic compounds and cytotoxic conjugates comprising these cytotoxic compounds and cell-binding agents. More specifically, this invention relates to novel thailanstatin A analogs, useful as cytotoxic small molecule toxins in antibody-drug conjugates (ADCs). The present invention further relates to compositions including these cytotoxic compounds and ADCs, and methods for using these toxins and ADCs to treat pathological conditions including cancer.

Compounds having a structure according to formula (I) or (II)

##STR00001##

where R.sup.1, R.sup.2, R.sup.3, R.sup.4, Ar and X.sup.1 are as defined herein, are agonists for the Toll-like receptor 7 (TLR7) and can be used as adjuvants for stimulating the immune system. Some such compounds can be used in conjugates for targeted delivery to the organ or tissue of intended action.

The disclosure relates to isolated antibodies and antigen-binding fragments that bind to the G protein of RSV and which are capable of neutralizing RSV A and B subtypes, and the use thereof in the diagnosis, prophylaxis, and/or treatment of RSV infections.

Multispecific antibodies (e.g., bispecific antibodies) that bind to HIV gp120 and CD3 are disclosed. Also disclosed are methods of using such antibodies to treat or prevent HIV infection.