Last country outside the hotzone to pass 42-day period-awaits official announcement...

The United Kingdom (UK) reached the 42-day mark, during which no new known cases resulted from the index case, on the 6th March 2015. 

The UK's accidentally imported Ebola virus disease (EVD) case, a female healthcare worker returning from deployment in Sierra Leone [1], last tested negative for Ebola virus on 23rd of January. She was discharged from hospital on 24th of January.[2]

Timeline of the UK EVD case. 
Green=onset; pink=hospitalization; blue=date of final NEG test on which the 42-day clock started; grey box=country considered, if not yet declared, free of known ongoing Ebola virus transmission.
Click on image to enlarge

All that remains now is for an official announcement...from someone (else) official, singing this achievement from the rooftops. 

A Public Health England report (below), posted on the UK government website has already acknowledged the 42 day mark. 

A bit understated even for the mother country!

From here
Click on image to enlarge.

References...

1. World Health Organization Disease Outbreak News (DON)
   http://www.who.int/csr/don/30-december-2014-ebola/en/
2. Ebola Situation Report - 4 March 2015
   http://apps.who.int/ebola/current-situation/ebola-situation-report-4-march-2015