SAMPLE NOTICE AND AVAILABILITY (see PDF of Notice):

CHEMBIO DIAGNOSTICS, INC.

* IMPORTANT NOTICE *

REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE SHAREHOLDER MEETING TO BE HELD ON JUNE 03, 2008

You are receiving this communication because you hold shares in the above company, and the material you should review before you cast your vote is now available.

This communication presents only an overview of the more complete proxy material that is available to you on the Internet.  We encourage you to access and review all of the important information contained in the proxy material before voting.

BROKER LOGO HERE

Return Address Line 1

Return Address Line 2

Return Address Line 3

51 MERCEDES WAY

EDGEWOOD NY 11717

Investor Address Line 1

Investor Address Line 2

Investor Address Line 3

Investor Address Line 4

Investor Address Line 5

John Sample

1234 ANYWHERE STREET

ANY CITY, ON A1A 1A1

PROXY MATERIAL AVAILABLE

1.           Form 10-KSB

2.           Notice & Proxy Statement

PROXY MATERIAL - VIEW OR RECEIVE

You can choose to view the material online or receive a paper or e-mail copy. There is NO charge for requesting a copy. Requests, instructions and other inquiries will NOT be forwarded to your investment advisor.

To facilitate timely delivery please make the request as instructed below on or before May 21, 2008

HOW TO VIEW MATERIAL VIA THE INTERNET

Have the 12 Digit Control Number(s) available and visit: www.proxyvote.com

HOW TO REQUEST A COPY OF MATERIAL

1.           BY INTERNET:                                           www.proxyvote.com

2.           BY TELEPHONE:                                           1-800-579-1639

3.           BY E-MAIL*:                                           sendmaterial@proxyvote.com

*If requesting material by e-mail, please send a blank e-mail with the 12 Digit Control Number (located on the following page) in the subject line.

See the Reverse Side for Meeting Information and Instructions on How to Vote

Notice - 1

MEETING INFORMATION

Meeting Type:  Annual Meeting

Meeting Date:  June 03, 2008

Meeting Time:  10:00 AM EST

For holders as of: April 14, 2008

Meeting Location:

Radisson Hotel

1730 North Ocean Avenue

Holtsville, New York 11742

HOW TO VOTE

VOTE IN PERSON:

Should you choose to vote these shares in person at the meeting you must request a "legal proxy". To request a legal proxy please follow the instructions at www.proxyvote.com or request a paper copy of the material.  To obtain directions to be able to attend the meeting and vote in person, please call (631) 924-1135.

VOTE BY INTERNET:

To vote now by Internet, go to WWW.PROXYVOTE.COM. Please refer to the proposals and follow the instructions.

Notice - 2

VOTING ITEMS

The Board of Directors recommends that you vote "For" the following:

1. Election of Directors

Nominees:

01 Alan Carus 02 Katherine L. Davis 03 Dr. Gary Meller 04 James D. Merselis 05 Lawrence A. Siebert

The Board of Directors recommends you vote FOR the following proposal(s).

2. To ratify the selection of Lazar, Levine & Felix, LLP as the Corporations certified independent accountants.

3.           To vote upon and approve the proposal to adopt the 2008 Equity Incentive Plan.

4.           In their discretion, to vote upon an adjournment or postponement of the meeting.

NOTE: Such other business as may properly come before the meeting or any adjournment thereof.

CONTROL # 0000 0000 0000

Notice - 3