In a study published on Sept. 22 in the journal Chaos, the authors took data collected in the seven-month period from Jan. 21 to July 31, 2020 and ran it through an algorithm that “selects a set of turning points for each state, computes distances between them, and determines whether each state is in (or over) a first or second surge.” A “turning point” is when a declining curve of cases spikes upward or a curve that is rising suddenly turns downward. Based on these findings, the researchers were able to determine that 31 states are in a second wave of the pandemic, 13 are still in the first wave, and a handful of other states either have either flattened the curve of the first wave, fully completed the second wave, or are coming off the first wave. Read on to find out what wave of the COVID pandemic your state is in—as well as the latest average of new cases per day (based on The New York Times data collected for the period ending on Sept. 23). And for more on how the virus is affecting people, check out The 98 Longest Lasting COVID Symptoms You Need to Know About. Wave: First Latest seven-day average: 867 cases per day And for an update on the ways in which you can contract the virus, check out Two New Studies Say You Can Now Get Coronavirus This Way. Wave: Second Latest seven-day average: 81 cases per day And for more on the coronavirus in the U.S., These Are the States Where COVID Cases Are Skyrocketing. Wave: Coming off the first wave Latest seven-day average: 914 cases per day And if you’re wondering when you’ll be able to ditch your face covering, Dr. Fauci Says This Is When We May Be Able to Stop Wearing Masks. Wave: First Latest seven-day average: 821 cases per day Wave: First Latest seven-day average: 3,576 cases per day And to find out what places make you more vulnerable to COVID, check out You’re Twice as Likely to Die of Coronavirus If You Live Here, Study Says. Wave: Second Latest seven-day average: 588 cases per day Wave: Second Latest seven-day average: 164 cases per day And for the latest COVID news delivered straight to your inbox, sign up for our daily newsletter. Wave: Second Latest seven-day average: 85 cases per day Wave: Second Latest seven-day average: 2,757 cases per day Wave: First Latest seven-day average: 1,491 cases per day And if you’re concerned you could have the virus, check out These Are the 51 Most Common COVID Symptoms You Could Have. Wave: Second Latest seven-day average: 110 cases per day Wave: Second Latest seven-day average: 348 cases per day Wave: Second Latest seven-day average: 1,864 cases per day Wave: Second Latest seven-day average: 793 cases per day Wave: Second Latest seven-day average: 897 cases per day Wave: Second Latest seven-day average: 644 cases per day Wave: First Latest seven-day average: 695 cases per day Wave: Second Latest seven-day average: 572 cases per day Wave: Completed the second wave Latest seven-day average: 33 cases per day Wave: Second Latest seven-day average: 487 cases per day Wave: Second Latest seven-day average: 402 cases per day Wave: Second Latest seven-day average: 787 cases per day Wave: Second Latest seven-day average: 898 cases per day Wave: First Latest seven-day average: 477 cases per day Wave: First Latest seven-day average: 1,579 cases per day Wave: Second Latest seven-day average: 221 cases per day Wave: Second Latest seven-day average: 408 cases per day Wave: First Latest seven-day average: 361 cases per day Wave: Second Latest seven-day average: 32 cases per day Wave: Flattened the curve after first waveae0fcc31ae342fd3a1346ebb1f342fcb Latest seven-day average: 457 cases per day Wave: First Latest seven-day average: 135 cases per day Wave: Flattened the curve after first wave Latest seven-day average: 789 cases per day Wave: First Latest seven-day average: 1,233 cases per day Wave: Second Latest seven-day average: 378 cases per day Wave: Second Latest seven-day average: 891 cases per day Wave: Second Latest seven-day average: 1,125 cases per day Wave: Second Latest seven-day average: 237 cases per day Wave: Second Latest seven-day average: 783 cases per day Wave: Second Latest seven-day average: 117 cases per day Wave: Second Latest seven-day average: 817 cases per day Wave: Second Latest seven-day average: 335 cases per day Wave: First Latest seven-day average: 1,381 cases per day Wave: First Latest seven-day average: 4,207 cases per day Wave: Coming off the first wave Latest seven-day average: 883 cases per day Wave: Completed the second wave Latest seven-day average: 3 cases per day Wave: Second Latest seven-day average: 890 cases per day Wave: Second Latest seven-day average: 475 cases per day Wave: Second Latest seven-day average: 187 cases per day Wave: First Latest seven-day average: 1,968 cases per day Wave: Second Latest seven-day average: 86 cases per day