Less than a month after would-be competitor DBV Technologies SA suffered a regulatory setback with its peanut allergy patch candidate, Aimmune Therapeutics Inc. – which at the start of the year gained FDA clearance for Palforzia in the same space – is undergoing an all-cash takeover valued at $2.6 billion by Nestle SA unit Nestle Health Science SA.

The matter of how adhesion of its Viaskin Peanut allergy patch relates to efficacy became a major problem for DBV Technologies SA, which drew a complete response letter (CRL) for the once-daily epicutaneous (EPIT) product. Shares of the Montrouge, France-based firm (NASDAQ:DBVT) closed Aug. 4 at $2.34, down $1.76, or 43%, in reaction to the CRL for the patch, designed to protect children ages 4 to 11. The FDA wants DBV to modify the patch, which means a new human-factor study; officials also are requiring clinical data for the modified patch.

In a step toward what may become the new normal, at least for now, the Pediatric Oncology Subcommittee of the FDA’s Oncologic Drugs Advisory Committee is meeting virtually Wednesday and Thursday to review pediatric development plans for four cancer drugs.

DBV Technologies SA officials took pains to reassure investors that data wanted by the FDA with regard to the BLA for Viaskin Peanut allergy therapy are already in hand and need only be turned over to the agency, but that didn’t stop shares (NASDAQ:DBVT) from sliding 55.7%, or $2.93, to close March 17 at $2.33.