Iranian authorities have imposed an internet ban but using trusted sources, special correspondent Fergal Keane hears from those traumatised by conflict and government repression.
A dissident in Tehran says she feels helpless and under immense psychological pressure.
No details have been released of Iran's response - or the US proposals - designed to bring the war to an end.
The BBC reports from the city of Ushuaia, where experts have been sent to investigate the origins of the outbreak.
