Nigeria and Senegal are Ebola-free. A Spanish nurse's aide has beaten Ebola. And Dallas has cleared dozens from Ebola monitoring.

There are many developments from over the weekend surrounding the disease across the world.

Get up to speed with the latest developments Monday:

 TEXAS: 

Forty-three people who came into contact with Ebola patient Thomas Eric Duncan are now officially cleared after not demonstrating any symptoms during a 21-day monitoring period, Dallas County Judge Clay Jenkins said Monday.

Dallas Mayor Mike Rawlings says 120 people are being monitored for Ebola symptoms but it's unclear how he came up with that total.

NIGERIA/SENEGAL: 

Nigeria was declared Ebola-free Monday, following an announcement that Senegal is now rid of the virus.

EBOLA CZAR BEGINS WORK THIS WEEK:

Ron Klain, the former chief of staff to two vice presidents who has been tapped as the Obama administration's "Ebola czar," will begin his new duties Wednesday, White House press secretary Josh Earnest said.

SPAIN: NURSE'S AIDE FREE OF EBOLA

Teresa Romero Ramos, who had contracted Ebola after caring for a patient with the deadly disease, is now free of the virus, Spain's Special Ebola Committee said Sunday.

WEST AFRICA: SITUATION REMAINS DIRE

The epidemic, however, is still spreading in Guinea, Liberia and Sierra Leone. WHO said those countries still have "widespread and intense transmission."

************ CONFIRMED U.S. CASES OF EBOLA:

RECEIVING TREATMENT:

Amber Vinson (nurse) – Arrived at Emory on October 15, 2014 for treatment.

Nina Pham (nurse)- Transferred on October 16, 2014 to NIH hospital in Maryland. Received blood transfusion from Dr. Kent Brantly.

Ashoka Mukpo (NBC News freelancer)- Currently at The Nebraska Medical Center; Diagnosed in Liberia on October 2, 2014. Received blood transfusion from Dr. Kent Brantly.

Anonymous Patient – Third patient being treated at Emory. Name has not been released and WHO and Emory are not confirming that he worked for WHO; Arrived at Emory on September 9, 2014. On a statement released Wednesday, October 15, the anonymous patient said they were "on the way to a full recovery."

BEING MONITORED

Hospital Workers:

CDC reports at least 76 health care workers who may have come into contact with Duncan after he was hospitalized are being monitored for symptoms of the disease. CDC is considering putting these health care workers on a "Do not board list."

Amber Vinson Contacts: 

Vinson officially began showing symptoms on Tuesday, October 14, 2014, but new reports bring that day into question. A CDC source said Vinson began feeling “funny” on Sunday, October 12, 2014.

If the October 14th day is accurate, the 21-day monitoring period will end Tuesday, November 4, 2014 for those that had contact with Vinson.

Family:

From Dallas County, Amber Vinson's mother Debra Berry is under self-quarantine at a Dallas hotel.

Amber Vinson's fiancé is currently staying in a Dallas hotel. He is self-monitoring for symptoms

Vinson's stepfather Kelvin Berry is under quarantine in Summit County.

Frontier Airlines:

The 6 crew members on that Frontier flight have been placed on paid leave for 21 days.

From Gov. Rick Perry: 79 people who were aboard the Frontier Flight with Amber Vinson from Dallas to Cleveland –  8 of those are being actively monitored (someone checks their temperatures twice a day). 71 are being monitored via phone.

From the Pentagon –  An active duty U.S. Marine has placed himself in voluntary quarantine in Texas after learning he was on the Frontier Airlines Flight from Cleveland to Dallas with nurse Amber Vinson. The Marines are not naming the man due to privacy concerns, but this is believed to be the first military service member directly impacted by the Ebola crisis.

NE Ohio:

As of Sunday 10/19 2pET, according to the Ohio Dept of Health, 3 people (in addition to Vinson's stepfather) are under quarantine. 48 people are under verified self-monitoring, 52 people are self-monitoring, 28 possible contacts have not been classified yet.

Nina Pham Contacts: 

Pham's dog, Bentley, was taken by the Dallas Animal Services and Adoption Center.

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RELATED: 2 African countries freed of Ebola; monitoring period over for 43 Texans