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                                                                     EXHIBIT 16

  July 24, 2000

  Securities and Exchange Commission
  450 Fifth Street, N.W.
  Washington, D.C. 20549

  Commissioners:

  We have read the statements made by Novavax, Inc. (copy attached), which we
  understand will be filed with the Commission, pursuant to Item 4 of Form 8-K,
  as part of the Company's Form 8-K report dated July 18, 2000. We agree with
  the statements concerning our Firm in such Form 8-K.

  Very truly yours,


  PricewaterhouseCoopers LLP