EXHIBIT 5.1

                                  DAVID E. WISE
                                 ATTORNEY AT LAW
                            8794 Rolling Acres Trail
                          Fair Oaks Ranch, Texas 78015
                                 (830) 981-8165


                                January 11, 2008

Colm j. King, President
Cavit Sciences, Inc.
100 E. Linton Boulevard, Suite 106B
Delray Beach, Florida 33483

Re: Cavit Sciences, Inc. - Registration Statement on Form S-8

Dear Mr. King:

     We have acted as counsel to Cavit  Sciences,  Inc.,  a Florida  corporation
("Company"), in connection with a Registration Statement on Form S-8, filed with
the  Securities  and  Exchange  Commission  on January 11,  2008  ("Registration
Statement").  The Registration  Statement covers 1,000,000 shares and options to
purchase  shares of the Company's  common stock ("Common  Stock"),  to be issued
pursuant to the Company's  2008 Employee and  Consultant  Stock  Incentive  Plan
("2008 Plan").

     In  rendering   this  opinion,   we  have  examined  (i)  the  Articles  of
Incorporation,  as amended, and By-Laws of the Company;  (ii) the resolutions of
the Board of Directors evidencing the corporate proceedings taken by the Company
to authorize  the adoption of the 2008 Plan;  (iii) the  Registration  Statement
(including  all  exhibits  thereto);  and (iv) such other  documents  as we have
deemed  appropriate  or  necessary  as  a  basis  for  the  opinion  hereinafter
expressed.

     In  rendering  this  opinion,  we  have  assumed  the  genuineness  of  all
signatures and the authenticity of all documents submitted to us as certified or
photo static  copies.  As to questions of fact material to this  opinion,  where
such facts have not been  independently  established,  and as to the content and
form of the Articles of Incorporation and amendments thereto,  By-Laws, minutes,
records,  resolutions and other  documents and writings of the Company,  we have
relied to the extent we deem reasonably appropriate upon your representations or
certificates of officers or directors of the Company without  independent  check
or verification of their accuracy.

     Based  upon and  subject to the  foregoing,  and having due regard for such
legal  considerations  as we  deem  relevant,  we are of the  opinion  that  the
1,000,000  shares of common  stock  reserved  under the 2008 Plan have been duly
authorized  and upon  payment for and  issuance of the shares of Common Stock in
the manner  described in the 2008 Plan,  subject to distribution as described in
the  Registration  Statement,  and subject to  effectiveness of the Registration
Statement described above, such Common Stock will be legally issued,  fully paid
and nonassessable.

     We call your attention to the fact that the  undersigned is a member of the
Texas Bar and the Company is a Florida corporation. We are familiar with Florida
Corporate Law to an extent where we are able to form this opinion.

     We hereby  consent  to the  filing of this  opinion  as an  Exhibit  to the
Registration  Statement and to the reference made to this firm under the heading
"Interests  of Named  Experts and  Counsel" in the  Prospectus  contained in the
Registration Statement and all amendments thereto.

Sincerely,


/s/ David E. Wise
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David E. Wise, Attorney at Law