An employee of Kamwo Herbal Pharmacy wearing mask works in Chinatown in New York, U.S., February 13, 2020. REUTERS/Yana Paskova 

A Palestinian man uses herbal remedies he bought from an apothecary shop to treat foot inflammation, in his home in Tubas in the Israeli-occupied West Bank September 23, 2019. Picture taken September 23, 2019. REUTERS/Raneen Sawafta 

A Palestinian apothecary prepares herbal remedies that some people use to treat their ailments, in a store in Nablus in the Israeli-occupied West Bank September 23, 2019. Picture taken September 23, 2019. REUTERS/Raneen Sawafta 

A Palestinian apothecary shows herbal remedies to a man that some people use to treat their ailments, in a store in Nablus in the Israeli-occupied West Bank September 23, 2019. Picture taken September 23, 2019. REUTERS/Raneen Sawafta 

A Palestinian apothecary prepares herbal remedies that some people use for their ailments, in a store in Nablus in the Israeli-occupied West Bank September 23, 2019. Picture taken September 23, 2019. REUTERS/Raneen Sawafta 

A Palestinian man tries herbal remedies that some people use to treat their ailments, in an apothecary store in Nablus in the Israeli-occupied West Bank October 1, 2019. Picture taken October 1, 2019. REUTERS/Raneen Sawafta 

A Palestinian apothecary prepares herbal remedies that some people use to treat their ailments, in a store in Nablus in the Israeli-occupied West Bank October 1, 2019. Picture taken October 1, 2019. REUTERS/Raneen Sawafta 

A Palestinian man uses herbal remedies he bought from an apothecary shop to treat foot inflammation, in his home in Tubas in the Israeli-occupied West Bank September 23, 2019. Picture taken September 23, 2019. REUTERS/Raneen Sawafta 

A Palestinian man uses herbal remedies he bought from an apothecary shop to treat foot inflammation, in his home in Tubas in the Israeli-occupied West Bank September 23, 2019. Picture taken September 23, 2019. REUTERS/Raneen Sawafta 

A Palestinian apothecary prepares herbal remedies that some people use to treat their ailments, in a store in Nablus in the Israeli-occupied West Bank September 23, 2019. Picture taken September 23, 2019. REUTERS/Raneen Sawafta 

A Palestinian apothecary prepares herbal remedies that some people use to treat their ailments, in a store in Nablus in the Israeli-occupied West Bank October 1, 2019. Picture taken October 1, 2019. REUTERS/Raneen Sawafta 

A Palestinian apothecary prepares herbal remedies that some people use to treat their ailments, in a store in Nablus in the Israeli-occupied West Bank September 23, 2019. Picture taken September 23, 2019. REUTERS/Raneen Sawafta 

Maruja Escalante, a nun with the Missionaries of Mary Immaculate and Catherine of Siena order, drinks an herbal beverage with indigenous Achuar people as part of an ancestral purification ritual in Wijint, a village in the Peruvian Amazon, Peru August 19, 2019. Picture taken August 19, 2019. REUTERS/Maria Cervantes 

Agbetuya Samuel, a local traditional healer and trader, is seen negotiating the price of pangolin head with a woman who trades herbal materials at a market in Akure, Ondo, Nigeria August 28, 2019. Picture taken August 28, 2019. REUTERS/Afolabi Sotunde 

Murtazha Hamis, 11, brought in after suffering a stroke resulting in partial paralysis, does push-ups at traditional healer Bi Mwanahija Mzee's clinic in Zanzibar City, Tanzania, January 20, 2019. Bi Mwanahija Mzee has been massaging Murtazha and prescribing him herbal baths for the past year. The boy's family credits the healer with helping the child regain mobility. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

An ornate tea service sits in a room recently renovated to film the YouTube channel of sheikh Salum, the founder of Shifaa Herbal clinic in Zanzibar City, Tanzania, March 3, 2019. Sheikhs at the Shifaa Herbal clinic read the Koran to cast out what they believe are supernatural sprits like djinns that are blamed for many maladies. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A woman screams as she is treated for what she believes is possession by supernatural sprits like djinns, while other women pray at the Shifaa Herbal clinic in Zanzibar City, Tanzania, February 17, 2019. People who visit the clinic believe that they can be cured of physical, spiritual and mental illnesses caused by djinn possession while listening to a sheikh recite words from the Koran. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Apprentice healer at Bin Rubea clinic Mohammed Saleh sits at his boss' dispensary waiting for customers in Zanzibar City, Tanzania, March 3, 2019. The founder of the clinic, Seif Khamis Rubea, bottles all his own products and also infuses Chinese medicine with his herbal practice. He sells these medicines at a shop 1 kilometre away from the clinic where he sees patients. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Women gather their things in preparation for departure after a Koranic recitation at the Shifaa Herbal clinic in Zanzibar City, Tanzania, February 17, 2019. Sheikhs at the Shifaa Herbal clinic read the Koran to cast out what they believe are supernatural sprits like djinns that are blamed for many maladies. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A sheikh at the Shifaa Herbal clinic holds onto a woman who is treated for what she believes is possession by supernatural sprits like djinns, in Zanzibar City, Tanzania, August 12, 2018. The woman had convulsions and fell to the floor during the process. REUTERS/Nicky Woo SEARCH "TANZANIA HEALTH" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Gauchos share mate (a type of herbal tea) next to cows in a corral at the Argentine Rural Society's Palermo livestock and agriculture camp exhibition, in Buenos Aires, Argentina July 25, 2019. Picture taken July 25, 2019. REUTERS/Agustin Marcarian 

Soccer - Paraguay - Eduardo Berizzo presented as new Paraguay national team coach - Ypane, Paraguay - February 22, 2019 Paraguay's new coach Eduardo Berizzo during the press conference with the national herbal infusion Terere REUTERS/Jorge Adorno 

A demonstrator drinks "mate", a traditional herbal infusion, during a protest in favour of legalising abortion outside the Congress in Buenos Aires, Argentina, July 3, 2018. REUTERS/Martin Acosta 

Mario Abdo Benitez (R), presidential candidate of Paraguay's Colorado Party, drinks the national herbal infusion Terere during a campaign rally at the Association of Officials and Employees of the Ministry of Education and Culture (AFEMEC), in Lambare, Paraguay April 7, 2018. REUTERS/Jorge Adorno 

Former Brazilian President Luiz Inacio Lula da Silva drinks mate, a typical herbal tea from Rio Grande do Sul state, during a rally in Santana do Livramento, Rio Grande do Sul state, Brazil March 19, 2018. Picture taken March 19, 2018. REUTERS/Diego Vara 

Former Brazilian President Luiz Inacio Lula da Silva drinks mate, a typical herbal tea from Rio Grande do Sul state, during a rally in Santana do Livramento, Rio Grande do Sul state, Brazil March 19, 2018. REUTERS/Diego Vara 

Employees handle cannabis at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

An employee picks up a bag filled with cannabis at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

Sinupret, a product by herbal medicines manufacturer Bionorica, is pictured at the company's headquarters in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

The logo of herbal medicines manufacturer Bionorica is pictured at the company's headquarters in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

Cannabis is pictured in the laboratory at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

Prefabricated syringes filled up with a bulk of cannabis called dronabinol are seen at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

An employee holds up a prefabricated syringe filled up with a bulk of cannabis called dronabinol at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

Cannabis in three different aggregation states is pictured in the laboratory at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

An employee holds up cannabis in the laboratory at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

An employee holds up cannabis in the laboratory at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

An employee picks up cannabis at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

An employee holds up a pre-fabricated syringe filled up with a bulk of cannabis called dronabinol at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

An employee holds up cannabis in the laboratory at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

An employee holds up a pre-fabricated syringe filled up with a bulk of cannabis called dronabinol at the headquarters of herbal medicines manufacturer Bionorica in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

The logo of herbal medicines manufacturer Bionorica is pictured at the company's headquarters in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

Michael Popp, CEO of herbal medicines manufacturer Bionorica, gestures during an interview in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

Michael Popp, CEO of herbal medicines manufacturer Bionorica, gestures during an interview in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

Michael Popp, CEO of herbal medicines manufacturer Bionorica, gestures during an interview in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

The headquarters of herbal medicines manufacturer Bionorica are pictured in Neumarkt, Germany February 9, 2018. Picture taken February 9, 2018. REUTERS/Michaela Rehle 

A woman looks on while mortaring herbs to make herbal tea as Paraguayans wait to vote on primary elections in Asuncion, Paraguay, December 17, 2017. REUTERS/Mario Valdez 

Goods which have been seized by UK Border Force officers at Heathrow Airport including taxidermy of endangered species, ivory carvings and herbal medicines sit on display at Custom House near Heathrow in London, Britain November 22, 2017. Picture taken November 22, 2017. REUTERS/Simon Dawson 

Herbal remedies seized by UK Border Force officers at Heathrow Airport sit on display at Custom House near Heathrow in London, Britain November 22, 2017. Picture taken November 22, 2017. REUTERS/Simon Dawson 

People sit together in an attempt to establish a Guinness World Record of the largest gathering of people drinking the national herbal infusion Terere, in Asuncion, Paraguay October 14, 2017. REUTERS/Jorge Adorno 

People react during an attempt to establish a Guinness World Record of the largest gathering of people drinking the national herbal infusion Terere, in Asuncion, Paraguay October 14, 2017. REUTERS/Jorge Adorno 

A woman drinks the national herbal infusion Terere during an attempt to establish a Guinness World Record of the largest gathering of people drinking Terere, in Asuncion, Paraguay October 14, 2017. REUTERS/Jorge Adorno 

A man drinks the national herbal infusion Terere during an attempt to establish a Guinness World Record of the largest gathering of people drinking Terere, in Asuncion, Paraguay October 14, 2017. REUTERS/Jorge Adorno 

Carlos Tapia (L), judge of Guinness World Records, announces Paraguay establishing a world record of the largest gathering of people drinking the national herbal infusion Terere, in Asuncion, Paraguay October 14, 2017. REUTERS/Jorge Adorno 

A woman with the colours of Paraguay's national flag painted on her face drinks a Paraguayan traditional herbal infusion called terere during a students' rally against a proposed amendment that would allow Paraguay's president to stand for re-election in Asuncion, Paraguay, April 2, 2017. REUTERS/Marcos Brindicci 

A worker at a herbal store buys flour in Cairo, Egypt January 10, 2017. Picture taken January 10, 2017. REUTERS/Mohamed Abd El Ghany 

Herbs for sale are pictured at a herbal store in Cairo, Egypt January 10, 2017. Picture taken January 10, 2017. REUTERS/Mohamed Abd El Ghany 

General view of a herbal store in Cairo, Egypt January 10, 2017. Picture taken January 10, 2017. REUTERS/Mohamed Abd El Ghany 

A customer explains his health issues as he asks for remedies at a herbal store in Cairo, Egypt January 10, 2017. Picture taken January 10, 2017. REUTERS/Mohamed Abd El Ghany 

A worker at herbal store, takes ingredients to prepare natural herbal drug in Cairo, Egypt January 10, 2017. Picture taken January 10, 2017. REUTERS/Mohamed Abd El Ghany