Infectious diseases, commercial aircraft:

Terrorists can weaponize powerful infectious diseases to spread across borders through commercial airplanes, a warning expert.

According to Daily Star Online, in the past six months alone, Zimbabwe has been affected by a cholera outbreak, the Democratic Republic of Congo has experienced a new Ebola outbreak, and "black death" has returned to Madagascar. Earlier this week, the first Briton infected with smallpox shared fear that she could transmit the deadly virus to her husband.

Professor Wyn Rees, a security expert at Nottingham University commented on Daily Star Online that the spread of disease through commercial aircraft is the "Holy Grail" of terrorism.

The spread of disease through commercial aircraft is the "Holy Grail" of terrorism.

"There are always a lot of warnings for such things, maybe bird flu or Ebola or chickenpox. These infectious diseases can actually spread across borders very quickly. I have no doubts about Public health officials are discussing the impact of these threats in Europe, of course, the discussions are top secret, " said Wyn Rees.

According to the expert, it will be difficult to detect passengers on the plane who are incubating these terrifying infectious diseases.

'Currently, we have a large amount of technology and specialized infrastructure to detect explosives in passenger plane suitcases - but there is no clear way to prevent the spread of plague , " said Wyn Rees.

However, the expert also said that the implementation of any such attack will not be easy.

"But there are real fears and it is still a real risk , " said Wyn Rees.

According to legend, the Holy Grail is a cup of Jesus used to drink alcohol. The Holy Grail is considered an invaluable treasure because it has magic, giving unparalleled power to the owner .