Sanofi And AstraZeneca Still Lead In RSV But Pfizer Has Chance To Challenge

Pandemic Affected Trial Results

Sanofi and AstraZeneca’s antibody nirsevimab is still likely to reach the market first, but Pfizer could be close behind with superior efficacy results.

RSV patient
Cases of RSV have rebounded after the pandemic lockdowns were lifted • Source: Alamy

Sanofi and AstraZeneca remain in pole position in the burgeoning respiratory syncytial virus (RSV) market after releasing Phase III data, but weaknesses in the results leave room for rival Pfizer to challenge them.

The good news for the partners is that the MELODY Phase III results show that their antibody nirsevimab cut cases of medically attended lower respiratory tract infections (LRTI) caused by

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