Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Ferenczy William J.

2. Date of Event Requiring Statement (MM/DD/YYYY) 5/18/2020

3. Issuer Name and Ticker or Trading Symbol

QUIDEL CORP /DE/ [QDEL]

(Last) (First) (Middle)

9975 SUMMERS RIDGE ROAD

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___X___ Officer (give title below) _____ Other (specify below)
SVP, Cardio/Metabolic Unit /

(Street)

SAN DIEGO, CA 92121

(City) (State) (Zip)

5. If Amendment, Date Original Filed(MM/DD/YYYY)

6. Individual or Joint/Group Filing(Check Applicable Line)

_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	4390	D

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Non-Qualified Stock Options (Right to Buy)	⁽¹⁾	2/5/2025	Common Stock	1954	$23.41	D
Non-Qualified Stock Options (Right to Buy)	⁽²⁾	2/10/2026	Common Stock	3910	$15.40	D
Non-Qualified Stock Options (Right to Buy)	⁽³⁾	2/15/2027	Common Stock	1349	$21.08	D
Non-Qualified Stock Options (Right to Buy)	⁽⁴⁾	1/16/2028	Common Stock	1727	$46.41	D
Non-Qualified Stock Options (Right to Buy)	⁽⁵⁾	2/4/2029	Common Stock	3322	$59.12	D
Non-Qualified Stock Options (Right to Buy)	⁽⁶⁾	2/3/2030	Common Stock	2609	$77.16	D
Non-Qualified Stock Options (Right to Buy)	⁽⁷⁾	3/30/2030	Common Stock	1737	$103.64	D
Restricted Stock Units	2/15/2021	2/15/2021	Common Stock	675	$0.00 ⁽⁸⁾	D
Restricted Stock Units	6/12/2021	6/12/2021	Common Stock	2000	$0.00 ⁽⁸⁾	D
Restricted Stock Units	1/16/2022	1/16/2022	Common Stock	1727	$0.00 ⁽⁸⁾	D
Restricted Stock Units	2/4/2023	2/4/2023	Common Stock	1661	$0.00 ⁽⁸⁾	D
Restricted Stock Units	⁽⁹⁾	⁽⁹⁾	Common Stock	2609	$0.00 ⁽⁸⁾	D
Restricted Stock Units	⁽¹⁰⁾	⁽¹⁰⁾	Common Stock	1736	$0.00 ⁽⁸⁾	D

Explanation of Responses:
(1)	977 shares vested on 02/05/2018 and 977 shares vested on 02/05/2019.
(2)	1,956 shares vested on 02/10/2018; 977 shares vested on 02/10/2019; and 977 shares vested on 02/10/2020.
(3)	675 shares vested on 02/15/2019; 337 shares vested on 02/15/2020; and 337 shares will vest on 02/15/2021.
(4)	864 shares will vest on 01/16/2021 and 863 shares will vest on 01/16/2022.
(5)	1,662 shares will vest on 02/04/2021; 830 shares will vest on 02/04/2022; and 830 shares will vest on 02/04/2023.
(6)	653 shares will vest on 02/03/2021; 652 shares will vest on 02/03/2022; 652 shares will vest on 02/03/2023; and 652 shares will vest on 02/03/2024.
(7)	435 shares will vest on 03/30/2021; 434 shares will vest on 03/30/2022; 434 shares will vest on 03/30/3023; and 434 shares will vest on 03/30/2024.
(8)	Each restricted stock unit represents the right to receive one share of Quidel Corporation common stock.
(9)	653 shares will vest on 02/03/2021; 652 shares will vest on 02/03/2022; 652 shares will vest on 02/03/2023; and 652 shares will vest on 02/03/2024.
(10)	434 shares will vest on 03/30/2021; 434 shares will vest on 03/30/2022; 434 shares will vest on 03/30/2023; and 434 shares will vest on 03/30/2024.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Ferenczy William J. 9975 SUMMERS RIDGE ROAD SAN DIEGO, CA 92121			SVP, Cardio/Metabolic Unit