Medicore, Inc. August 12, 1997 Mr. Dennis W. Healey Executive Vice President Viragen, Inc. 865 S.W. 78th Ave., Suite 100 Plantation, Florida 33324 Dear Dennis: Pursuant to Section 6 of the lease between Viragen, Inc. and Medicore, Inc. entered into on...

                                                               Medicore, Inc.

August 12, 1997

Xx. Xxxxxx X. Xxxxxx
Executive Vice President
Viragen, Inc.
000 X.X. 00xx Xxx., Xxxxx 000
Xxxxxxxxxx, Xxxxxxx 00000

Dear Xxxxxx:

Pursuant to Section 6 of the lease between Viragen, Inc. and Medicore,
Inc. entered into on December 8, 1992, Medicore, Inc. will exercise its
first renewal option under the lease for which the original term expires
December 31, 1997.  This letter represents Medicore, Inc.'s notification
to Viragen, Inc. that it is exercising the first renewal option for an
additional 5 years.

Please acknowledge receipt of this notification by signing and dating the
acknowledgment and returning one copy.

Yours very truly,

/s/ Xxxxxx X. Xxxxx

Xxxxxx X. Xxxxx
Vice President/Finance

ACKNOWLEDGMENT OF RECEIPT:

  /s/ Xxxxxx X. Xxxxxx               8/14/97
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     Xxxxxx X. Xxxxxx                 Date
        Exec. V.P.






0000 Xxxx 00xx Xxxxxx, Xxxxxxx, Xxxxxxx 00000 . (000) 000-0000