1 Exhibit 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 33-80277, 33-80279, 333-3384 and 333-77611) and in the Prospectus constituting part of the Registration Statements on Form S-3 (Nos. 333-14305, 333-05367, 333-22685 and 333-46409 and 333-77609) of Novavax, Inc. of our report dated October 6, 1999, appearing on page 4 of this Form 8-K/A. /s/ Wagner Sharer Murtaugh & Petree - ----------------------------------------------- Wagner Sharer Murtaugh & Petree Malvern, PA October 12, 1999 17