New covid cases declined for the fourth straight week in the week leading up to Nov. 4, reaching their lowest level in almost two months, according to state covid data.

Among the towns, Marion had four new cases, Mattapoisett had six and Rochester had nine. In total, the Tri-Town had 19 new cases of covid after tallying 36 the previous week.

Over the last four weeks, the Tri-Town has averaged just under 40 new cases per week.

At Tri-Town schools, new cases spiked slightly with the vast majority of the 26 new cases coming from Rochester Memorial School.

The ORR district reported 20 new cases from RMS, three from OR High School, two from OR Junior High and one from Mattapoisett’s Old Hammondtown School.

In total, the district has reported 129 covid cases this school year.

Meanwhile, vaccination rates remain very high in Marion and Mattapoisett where over 80% of residents are fully vaccinated and about 90% have at least one dose.

In Rochester, however, vaccination rates have largely stagnated below the county average. About 68% of Rochester residents have had at least one dose of a covid vaccine, with 62% fully vaccinated.

As of Nov. 4, Plymouth County had an average of 71% of residents with at least one dose and 63% fully vaccinated.

OR Junior High School reported a full-vaccination rate of 58.8% on Nov. 4, while OR High School is at 79.7%, both remaining nearly identical from the previous week.

Two Tri-Town elementary schools that reported vaccination rates for the first time last week were excluded from this week’s covid dashboard.

The Massachusetts Department of Elementary and Secondary Education recently delayed the earliest date that school mask mandates could be lifted from Nov. 1 until January 15.

After that time, any school that reaches an 80% full-vaccination rate will be eligible to have its mask mandates lifted.

State covid data is released every Thursday evening and ORR covid data is released every Friday evening.