Shares in Valneva SE fell sharply after the company said European regulators came back with further queries, including on antibody efficacy data, instead of a recommendation during a rolling review of its delayed COVID-19 vaccine. The company had expected a positive opinion on the vaccine, known as VLA-2001, following the April meeting of the European Medicines Agency’s CHMP committee.

Biogen Inc. has given up on its attempt to get its Alzheimer’s disease drug Aduhelm (aducanumab) approved by regulators in Europe, deciding to withdraw its filing midway through a review of a previous rejection. The company had asked the European Medicines Agency’s CHMP to reconsider its negative opinion for Aduhelm in December 2021. But its subsidiary in the Netherlands wrote to the EMA this week saying that it had decided to withdraw its marketing authorization application after all.

With the Russian invasion of Ukraine continuing to disrupt thousands of clinical trials throughout the region, the European Commission, the EMA and the Heads of Medicines Agencies are developing advice to help sponsors mitigate the issues. For now, sponsors should apply the approaches and flexibilities used during the COVID-19 pandemic to the current situation, the groups said March 30.