| Ruben Argueta | Director of Investor Relations |
| Doug Bryant | President & Chief Executive Officer |
| Randy Steward | Chief Financial Officer |
| Alex Nowak | Craig-Hallum |
| Griffin Soriano | William Blair |
| Steven Mah | Piper Sandler |
| Andrew Cooper | Raymond James |
| Jack Meehan | Nephron Research |
Welcome to the Quidel Corporation First Quarter 2021 Earnings Conference Call. At this time, all participants are in a listen-only mode. Later, instructions will be given for the question-and-answer session. [Operator Instructions] I'd now like to turn the call over to Mr. Ruben Argueta, Quidel's Director of Investor Relations.