Security experts say a spike in email scams linked to coronavirus is the worst they have seen in years.
Cyber-criminals are targeting individuals as well as industries, including aerospace, transport, manufacturing, hospitality, healthcare and insurance.
Phishing emails written in English, French, Italian, Japanese, and Turkish languages have been found.
The BBC has tracked five of the campaigns.
1. Click here for a cure
Researchers at the cyber-security firm Proofpoint first noticed a strange email being sent to customers in February. The message purported to be from a mysterious doctor claiming to have details about a vaccine being covered up by the Chinese and UK governments.
The firm says people who click on the attached document are taken to a spoof webpage designed to harvest login details. It says up to 200,000 of the emails are being sent at a time.
“We have seen 35-plus consecutive days of malicious coronavirus email campaigns, with many using fear to convince victims to click,” says Sherrod DeGrippo from the company’s threat research and detection team.
Proofpoint says three to four variations are launched each day.
“It’s obvious these campaigns are returning dividends for cyber-criminals,” says Ms DeGrippo.
The best way to see where a link will take you is to hover your mouse cursor over it to reveal the true web address. If it looks dodgy, don’t click.
2. Covid-19 tax refund
Researchers at cyber-security firm Mimecast flagged this scam a few weeks ago. On the morning they detected it, they saw more than 200 examples in just a few hours.
If a member of the public clicked on “access your funds now”, it would take them to a fake government webpage, encouraging them to input all their financial and tax information.
“Do not respond to any electronic communication in relation to monies via email,” says Carl Wearn, head of e-crime at Mimecast. “And certainly do not click on any links in any related message. This is not how HMRC would advise…