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Viral release from an infected cell is crucial for the spread of infection.

Neuraminidase inhibitors are a class of antiviral drugs that can prevent the release of viruses, such as influenza A.

The influenza A viral surface contains two essential glycoproteins — hemagglutinin and neuraminidase.

Hemagglutinin binds to sialic acid receptors on the host cell surface, helping in viral entry.

Once inside, the viral RNA uses the host cell's machinery to produce viral proteins.

These proteins, including hemagglutinin and neuraminidase, are assembled into new viral particles at the host cell membrane.

As the virus matures, new virions bud from the host cell surface. But they initially remain attached because hemagglutinin binds to sialic acid residues on the host cell membrane.

Neuraminidase cleaves these residues, allowing the virion to detach from the host cell.

Neuraminidase inhibitors are structural analogs of sialic acid that block neuraminidase activity.

As a result, the virus remains bound to the host cell, preventing further spread of infection.