ADDITIONAL INFORMATION
On December 8, 2010, JJC Acquisition Company B.V. (the “Offeror”), a wholly owned subsidiary of
Johnson & Johnson, commenced a cash tender offer (the “Offer”) to acquire all of the issued and
outstanding ordinary shares (“Ordinary Shares”) in the capital of Crucell N.V. (“Crucell”), including all
Ordinary Shares represented by American depositary shares (each, an “ADS”), on the terms and
subject to the conditions and restrictions contained in the Offer Document dated December 8, 2010
(the “Offer Document”). Shareholders who accept the Offer and tender Ordinary Shares will be paid,
on the terms and subject to the conditions and restrictions contained in the Offer Document, an
amount equal to €24.75, net to the Shareholders in cash, without interest and less any applicable
withholding taxes (the “Offer Price”) in consideration of each Ordinary Share, subject to the Offeror
declaring the Offer unconditional. Shareholders who accept the Offer and tender ADSs will be paid,
on the terms and subject to the conditions and restrictions contained in the Offer Document, an
amount equal to the U.S. dollar equivalent of the Offer Price, calculated by using the spot market
exchange rate for the U.S. dollar against the Euro on the date on which funds are received by
Computershare Trust Company, N.A. to pay for ADSs upon completion of the Offer, in consideration
of each ADS, subject to the Offeror declaring the Offer unconditional. The offer and withdrawal rights
will expire at 17:45 hours Dutch time (11:45 a.m. New York time), on February 16, 2011, unless
extended in the manner set forth in the Offer Document. This communication is neither an offer to
purchase nor a solicitation of an offer to sell shares of Crucell, nor shall there be any sale or purchase
of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to
registration or qualification under the securities laws of any such jurisdiction. The offer is being made
pursuant to the tender offer statement on Schedule TO (including the Offer Document, a related ADS
letter of transmittal and tender and proxy form, and other relevant materials) filed by the Offeror with
the U.S. Securities and Exchange Commission (“SEC”) on December 8, 2010.
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