Public Health England says it has not been notified of any Ebola risk after more than 30 people were found in a shipping container, some with "significant health problems".
A spokeswoman told ITV News PHE was not currently involved in the incident at Tilbury Docks.
She said the public agency would have been informed "very quickly" if it was linked to the deadly virus.
The uncle of dead Afghan immigrant Meet Singh Kapoor says he wanted a better life for his children. Instead his children watched him die.
ITV News has spoken to the translator police used after 35 Afghan Sikhs, including 13 children, were found in a boat in Tilbury Docks.
ITV News has obtained exclusive footage of people, believed to be Afghan Sikhs, being released from a shipping container at Tilbury Docks.