Antibiotics are effective against viral infections.

Stated the claim and limited the scope to viral infections.

Specified the medical standard and excluded bacterial complications.

Identified mechanism and clinical guidance as evidence.

Retrieved the NHS antibiotic guidance.

Recorded the exact recommendation.

Checked the quotation and reviewed its scope.

Built the mechanism-based refutation.

Considered the bacterial-coinfection alternative.

Checked that the refutation targets the stated claim.

Distinguished the viral infection from secondary bacterial infection.

Noted that the thesis is not medical advice.

Assigned refuted under the stated standard.