The region around Encore Boston Harbor in Everett has not experienced a sizable increase in crime attributable to the casino, according to research presented to gaming regulators Thursday.

Consultants for the Massachusetts Gaming Commission studied crime data for Chelsea, Malden, Melrose, Saugus, Lynn and the casino’s hometown of Everett over a period of nearly four years from Sept. 30, 2018 to July 2, 2022.

They found that while offense rates fluctuated, the trends indicate the casino “has limited impact on crime in the region.”

Noah Fritz, the principal investigator at consultant Justice Research Associates, told commissioners on Thursday that the data pointed to a significant increase in crime rates after Encore shut its doors to minimize COVID-19 risks and before the casino reopened, suggesting the hub for legal gambling “wasn’t the primary effect of criminal activity.”

Sales of Moderna’s COVID-19 vaccine plunged in the first quarter and some expenses soared, but Wall Street expected this and the drugmaker topped expectations.

Moderna said Thursday that revenue from its Spikevax vaccine tumbled to $1.83 billion in the quarter from nearly $6 billion a year ago.

The Spikevax vaccine is Moderna’s main source of revenue, but the company also is developing other vaccines including a potential flu shot and a vaccine for the respiratory illness known as RSV.

Overall, Moderna’s first-quarter net income sank to $79 million from $3.7 billion, and earnings totaled 19 cents per share on $1.86 billion in total revenue.

Analysts had expected a loss of $1.75 per share on $1.18 billion in revenue, according to the data firm FactSet.